CSDMS - User contributions [en]

HPCCprojects:Double-diffusive instabilities in sediment-laden systems with applications to riverine outflows

2013-05-29T21:25:29Z

Pburns:

__NOTOC__
={{PAGENAME}}=
==Project description==

When a layer of particle-laden fresh water is placed above clear, saline water, both double-diffusive and Rayleigh-Taylor instabilities may arise. Such a configuration can arise from hypopycnal river outflows into the salty ocean. The presence of these two instabilities can increase the flux of sediment out of the plume beyond that predicted by Stokes settling of individual particles. In addition, the presence of settling particles modifies traditional double-diffusive fingering to create a distinctly different mode. With this motivation in mind, we study the modification of the double-diffusive instability in the presence of settling particles using the tools of linear stability (LS) and direct numerical simulation (DNS).

An important parameter that arises from LS results is the ratio of the unstable layer thickness to the diffusive interface thickness of the salinity profile. When this value is small, the instability eigenmodes primarily resemble double-diffusive modes, while at larger values the sediment and salinity interfaces become increasingly decoupled and the dominant instability mode becomes Rayleigh-Taylor like. Results from DNS show that this parameter quickly grows before plateauing at a constant value for the rest of the simulation. This value is determined solely by the balance between the advective settling flux of sediment into the rose region and the fingering flux out. The balance between the settling and fingering fluxes is characterized by the settling velocity, the salinity Schmidt number and the stability ratio. For settling-dominated situations, we show that the resulting instability mode becomes a phase-locked fingering mode. This mode has the same spectral content as the traditional fingering mode but the large scale convective overturning generated by the Rayleigh-Taylor mode creates a phase-locking that results in very thin, wisp-like plumes released from the base of the unstable layer. Across a large range of parameters, the interfacial sediment flux is seen to scale most appropriately with the pure double-diffusive flux. This is contrary to the traditional method of basing the flux on the Stokes settling velocity. In addition, a flux enhancement coefficient is calculated which corrects the double-diffusive flux in settling-dominated systems.

==Objectives==
* To understand in a general way how the double-diffusive and Rayleigh-Taylor instability modes interact in a sediment-laden fluid.
* To understand the origin on the leaking mode, as opposed to the traditional fingering mode in double-diffusion, and how this mode modifies the flux out of the river plume. See Parsons et al (2001) for experimental evidence of the leaking mode.
* To predict the type of instability mode that will be present in a given system ''a priori'' of its development.

==Time-line==
* Start: Fall 2008

==Models in use==
SISV, a '''S'''pectral, '''I'''mpliciti, '''S'''treamfunction-'''V'''orticity solver for the Navier-Stokes equations. This code has the following properties:
* 2d flow solver
* High accuracy. Spectral in horizontal and compact finite differences in vertical
* Runs in parallel with MPI-based communication
* Navier-Stokes equations to describe the fluid motion
* Transport equation to describe the particle (and/or salinity) motion
* Uses ''FFTW'' and ''LAPACK'' for efficient calculations

==Results==
List the results of your project

==Users==
* [[User:Pburns | Peter Burns]]
* [[User:Senthil | Senthilkumaran Radhakrishnan]]
* Roman Fuchs

==Funding==
This research was supported by NSF grants CBET-0854338, CBET-1067847 and OCE-1061300.

==Publications and presentations==
* Burns, P. and Meiburg, E. ''Sediment-laden Fresh Water above Salt Water: Linear Stability analysis.'' J. Fluid Mech. 691. pp 279. (2012) [http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8474654]

* Parsons, J., Bush, J. and Syvitski J. ''Hyperpycnal plume formation from riverine outflows with small sediment concentrations.'' Sedimentology. 48. 465-478. (2001) [http://onlinelibrary.wiley.com/doi/10.1046/j.1365-3091.2001.00384.x/abstract]

==Links==
* [http://www.me.ucsb.edu/~pburns/research.html Research homepage]
* [https://sites.google.com/site/ucsbcfdlab UCSB CFDLAB]

[[Category:Research project]]

HPCCprojects:Double-diffusive instabilities in sediment-laden systems with applications to riverine outflows

2013-05-29T21:24:08Z

Pburns:

__NOTOC__
={{PAGENAME}}=
==Project description==

When a layer of particle-laden fresh water is placed above clear, saline water, both double-diffusive and Rayleigh-Taylor instabilities may arise. Such a configuration can arise from hypopycnal river outflows into the salty ocean. The presence of these two instabilities can increase the flux of sediment out of the plume beyond that predicted by Stokes settling of individual particles. In addition, the presence of settling particles modifies traditional double-diffusive fingering to create a distinctly different mode. With this motivation in mind, we study the modification of the double-diffusive instability in the presence of settling particles using the tools of linear stability (LS) and direct numerical simulation (DNS).

An important parameter that arises from LS results is the ratio of the unstable layer thickness to the diffusive interface thickness of the salinity profile. When this value is small, the instability eigenmodes primarily resemble double-diffusive modes, while at larger values the sediment and salinity interfaces become increasingly decoupled and the dominant instability mode becomes Rayleigh-Taylor like. Results from DNS show that this parameter quickly grows before plateauing at a constant value for the rest of the simulation. This value is determined solely by the balance between the advective settling flux of sediment into the rose region and the fingering flux out. The balance between the settling and fingering fluxes is characterized by the settling velocity, the salinity Schmidt number and the stability ratio. For settling-dominated situations, we show that the resulting instability mode becomes a phase-locked fingering mode. This mode has the same spectral content as the traditional fingering mode but the large scale convective overturning generated by the Rayleigh-Taylor mode creates a phase-locking that results in very thin, wisp-like plumes released from the base of the unstable layer. Across a large range of parameters, the interfacial sediment flux is seen to scale most appropriately with the pure double-diffusive flux. This is contrary to the traditional method of basing the flux on the Stokes settling velocity. In addition, a flux enhancement coefficient is calculated which corrects the double-diffusive flux in settling-dominated systems.

==Objectives==
* To understand in a general way how the double-diffusive and Rayleigh-Taylor instability modes interact in a sediment-laden fluid.
* To understand the origin on the leaking mode, as opposed to the traditional fingering mode in double-diffusion, and how this mode modifies the flux out of the river plume. See Parsons et al (2001) for experimental evidence of the leaking mode.
* To predict the type of instability mode that will be present in a given system ''a priori'' of its development.

==Time-line==
* Start: Fall 2008

==Models in use==
SISV, a ''S''pectral, ''I''mpliciti, ''S''treamfunction-''V''orticity solver for the Navier-Stokes equations. This code has the following properties:
* 2d flow solver
* High accuracy. Spectral in horizontal and compact finite differences in vertical
* Runs in parallel with MPI-based communication
* Navier-Stokes equations to describe the fluid motion
* Transport equation to describe the particle (and/or salinity) motion
* Uses ''FFTW'' and ''LAPACK'' for efficient calculations

==Results==
List the results of your project

==Users==
* [[User:Pburns | Peter Burns]]
* [[User:Senthil | Senthilkumaran Radhakrishnan]]
* Roman Fuchs

==Funding==
This research was supported by NSF grants CBET-0854338, CBET-1067847 and OCE-1061300.

==Publications and presentations==
* Burns, P. and Meiburg, E. ''Sediment-laden Fresh Water above Salt Water: Linear Stability analysis.'' J. Fluid Mech. 691. pp 279. (2012) [http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8474654]

* Parsons, J., Bush, J. and Syvitski J. ''Hyperpycnal plume formation from riverine outflows with small sediment concentrations.'' Sedimentology. 48. 465-478. (2001) [http://onlinelibrary.wiley.com/doi/10.1046/j.1365-3091.2001.00384.x/abstract]

==Links==
* [http://www.me.ucsb.edu/~pburns/research.html Research homepage]
* [https://sites.google.com/site/ucsbcfdlab UCSB CFDLAB]

[[Category:Research project]]

HPCCprojects:Double-diffusive instabilities in sediment-laden systems with applications to riverine outflows

2013-05-29T21:21:41Z

Pburns:

__NOTOC__
={{PAGENAME}}=
==Project description==

When a layer of particle-laden fresh water is placed above clear, saline water, both double-diffusive and Rayleigh-Taylor instabilities may arise. Such a configuration can arise from hypopycnal river outflows into the salty ocean. The presence of these two instabilities can increase the flux of sediment out of the plume beyond that predicted by Stokes settling of individual particles. In addition, the presence of settling particles modifies traditional double-diffusive fingering to create a distinctly different mode. With this motivation in mind, we study the modification of the double-diffusive instability in the presence of settling particles using the tools of linear stability (LS) and direct numerical simulation (DNS).

An important parameter that arises from LS results is the ratio of the unstable layer thickness to the diffusive interface thickness of the salinity profile. When this value is small, the instability eigenmodes primarily resemble double-diffusive modes, while at larger values the sediment and salinity interfaces become increasingly decoupled and the dominant instability mode becomes Rayleigh-Taylor like. Results from DNS show that this parameter quickly grows before plateauing at a constant value for the rest of the simulation. This value is determined solely by the balance between the advective settling flux of sediment into the rose region and the fingering flux out. The balance between the settling and fingering fluxes is characterized by the settling velocity, the salinity Schmidt number and the stability ratio. For settling-dominated situations, we show that the resulting instability mode becomes a phase-locked fingering mode. This mode has the same spectral content as the traditional fingering mode but the large scale convective overturning generated by the Rayleigh-Taylor mode creates a phase-locking that results in very thin, wisp-like plumes released from the base of the unstable layer. Across a large range of parameters, the interfacial sediment flux is seen to scale most appropriately with the pure double-diffusive flux. This is contrary to the traditional method of basing the flux on the Stokes settling velocity. In addition, a flux enhancement coefficient is calculated which corrects the double-diffusive flux in settling-dominated systems.

==Objectives==
* To understand in a general way how the double-diffusive and Rayleigh-Taylor instability modes interact in a sediment-laden fluid.
* To understand the origin on the leaking mode, as opposed to the traditional fingering mode in double-diffusion, and how this mode modifies the flux out of the river plume. See Parsons et al (2001) for experimental evidence of the leaking mode.
* To predict the type of instability mode that will be present in a given system ''a priori'' of its development.

==Time-line==
* Start: Fall 2008

==Models in use==
SISV, a ''S''pectral, ''I''mpliciti, ''S''treamfunction-''V''orticity solver for the Navier-Stokes equations. This code has the following properties:
* Property 1
* Property 2

==Results==
List the results of your project

==Users==
* [[User:Pburns | Peter Burns]]
* [[User:Senthil | Senthilkumaran Radhakrishnan]]
* Roman Fuchs

==Funding==
This research was supported by NSF grants CBET-0854338, CBET-1067847 and OCE-1061300.

==Publications and presentations==
* Burns, P. and Meiburg, E. ''Sediment-laden Fresh Water above Salt Water: Linear Stability analysis.'' J. Fluid Mech. 691. pp 279. (2012) [http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8474654]

* Parsons, J., Bush, J. and Syvitski J. ''Hyperpycnal plume formation from riverine outflows with small sediment concentrations.'' Sedimentology. 48. 465-478. (2001) [http://onlinelibrary.wiley.com/doi/10.1046/j.1365-3091.2001.00384.x/abstract]

==Links==
* [http://www.me.ucsb.edu/~pburns/research.html Research homepage]
* [https://sites.google.com/site/ucsbcfdlab UCSB CFDLAB]

[[Category:Research project]]

HPCCprojects:Double-diffusive instabilities in sediment-laden systems with applications to riverine outflows

2013-05-29T21:20:58Z

Pburns:

__NOTOC__
={{PAGENAME}}=
==Project description==

When a layer of particle-laden fresh water is placed above clear, saline water, both double-diffusive and Rayleigh-Taylor instabilities may arise. Such a configuration can arise from hypopycnal river outflows into the salty ocean. The presence of these two instabilities can increase the flux of sediment out of the plume beyond that predicted by Stokes settling of individual particles. In addition, the presence of settling particles modifies traditional double-diffusive fingering to create a distinctly different mode. With this motivation in mind, we study the modification of the double-diffusive instability in the presence of settling particles using the tools of linear stability (LS) and direct numerical simulation (DNS).

An important parameter that arises from LS results is the ratio of the unstable layer thickness to the diffusive interface thickness of the salinity profile. When this value is small, the instability eigenmodes primarily resemble double-diffusive modes, while at larger values the sediment and salinity interfaces become increasingly decoupled and the dominant instability mode becomes Rayleigh-Taylor like. Results from DNS show that this parameter quickly grows before plateauing at a constant value for the rest of the simulation. This value is determined solely by the balance between the advective settling flux of sediment into the rose region and the fingering flux out. The balance between the settling and fingering fluxes is characterized by the settling velocity, the salinity Schmidt number and the stability ratio. For settling-dominated situations, we show that the resulting instability mode becomes a phase-locked fingering mode. This mode has the same spectral content as the traditional fingering mode but the large scale convective overturning generated by the Rayleigh-Taylor mode creates a phase-locking that results in very thin, wisp-like plumes released from the base of the unstable layer. Across a large range of parameters, the interfacial sediment flux is seen to scale most appropriately with the pure double-diffusive flux. This is contrary to the traditional method of basing the flux on the Stokes settling velocity. In addition, a flux enhancement coefficient is calculated which corrects the double-diffusive flux in settling-dominated systems.

==Objectives==
* To understand in a general way how the double-diffusive and Rayleigh-Taylor instability modes interact in a sediment-laden fluid.
* To understand the origin on the leaking mode, as opposed to the traditional fingering mode in double-diffusion, and how this mode modifies the flux out of the river plume. See Parsons et al (2001) for experimental evidence of the leaking mode.
* To predict the type of instability mode that will be present in a given system ''a priori'' of its development.

==Time-line==
* Start: Fall 2008

==Models in use==
SISV, a ''S''pectral, ''I''mpliciti, ''S''treamfunction-''V''orticity solver for the Navier-Stokes equations. This code has the following properties:
* Property 1
* Property 2

==Results==
List the results of your project

==Users==
* [[User:Pburns | Peter Burns]]
* [[User:Senthil | Senthilkumaran Radhakrishnan]]
* Roman Fuchs

==Funding==
This research was supported by NSF grants CBET-0854338, CBET-1067847 and OCE-1061300.

==Publications and presentations==
* Burns, P. and Meiburg, E. ''Sediment-laden Fresh Water above Salt Water: Linear Stability analysis.'' J. Fluid Mech. 691. pp 279. (2012) [http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8474654]

* Parsons, J., Bush, J. and Syvitski J. ''Hyperpycnal plume formation from riverine outflows with small sediment concentrations.'' Sedimentology. 48. 465-478. (2001) [http://onlinelibrary.wiley.com/doi/10.1046/j.1365-3091.2001.00384.x/abstract]

==Links==
* [[http://www.me.ucsb.edu/~pburns/research.html | Research homepage]]
* [[https://sites.google.com/site/ucsbcfdlab | UCSB CFDLAB]]

[[Category:Research project]]

HPCCprojects:Double-diffusive instabilities in sediment-laden systems with applications to riverine outflows

2013-05-29T21:19:42Z

Pburns:

__NOTOC__
={{PAGENAME}}=
==Project description==

When a layer of particle-laden fresh water is placed above clear, saline water, both double-diffusive and Rayleigh-Taylor instabilities may arise. Such a configuration can arise from hypopycnal river outflows into the salty ocean. The presence of these two instabilities can increase the flux of sediment out of the plume beyond that predicted by Stokes settling of individual particles. In addition, the presence of settling particles modifies traditional double-diffusive fingering to create a distinctly different mode. With this motivation in mind, we study the modification of the double-diffusive instability in the presence of settling particles using the tools of linear stability (LS) and direct numerical simulation (DNS).

An important parameter that arises from LS results is the ratio of the unstable layer thickness to the diffusive interface thickness of the salinity profile. When this value is small, the instability eigenmodes primarily resemble double-diffusive modes, while at larger values the sediment and salinity interfaces become increasingly decoupled and the dominant instability mode becomes Rayleigh-Taylor like. Results from DNS show that this parameter quickly grows before plateauing at a constant value for the rest of the simulation. This value is determined solely by the balance between the advective settling flux of sediment into the rose region and the fingering flux out. The balance between the settling and fingering fluxes is characterized by the settling velocity, the salinity Schmidt number and the stability ratio. For settling-dominated situations, we show that the resulting instability mode becomes a phase-locked fingering mode. This mode has the same spectral content as the traditional fingering mode but the large scale convective overturning generated by the Rayleigh-Taylor mode creates a phase-locking that results in very thin, wisp-like plumes released from the base of the unstable layer. Across a large range of parameters, the interfacial sediment flux is seen to scale most appropriately with the pure double-diffusive flux. This is contrary to the traditional method of basing the flux on the Stokes settling velocity. In addition, a flux enhancement coefficient is calculated which corrects the double-diffusive flux in settling-dominated systems.

==Objectives==
* To understand in a general way how the double-diffusive and Rayleigh-Taylor instability modes interact in a sediment-laden fluid.
* To understand the origin on the leaking mode, as opposed to the traditional fingering mode in double-diffusion, and how this mode modifies the flux out of the river plume. See Parsons et al (2001) for experimental evidence of the leaking mode.
* To predict the type of instability mode that will be present in a given system ''a priori'' of its development.

==Time-line==
* Start: Fall 2008

==Models in use==
SISV, a ''S''pectral, ''I''mpliciti, ''S''treamfunction-''V''orticity solver for the Navier-Stokes equations. This code has the following properties:
* Property 1
* Property 2

==Results==
List the results of your project

==Users==
* [[User:Pburns|Peter Burns]]
* [[User:Senthil|Senthilkumaran Radhakrishnan]]
* Roman Fuchs

==Funding==
This research was supported by NSF grants CBET-0854338, CBET-1067847 and OCE-1061300.

==Publications and presentations==
Burns, P. and Meiburg, E. ''Sediment-laden Fresh Water above Salt Water: Linear Stability analysis.'' J. Fluid Mech. 691. pp 279. (2012) [http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8474654]
Parsons, J., Bush, J. and Syvitski J. ''Hyperpycnal plume formation from riverine outflows with small sediment concentrations.'' Sedimentology. 48. 465-478. (2001) [http://onlinelibrary.wiley.com/doi/10.1046/j.1365-3091.2001.00384.x/abstract]

==Links==
[[http://www.me.ucsb.edu/~pburns/research.html|Research homepage]]
[[https://sites.google.com/site/ucsbcfdlab|UCSB CFDLAB]]

[[Category:Research project]]

HPCCprojects:Double-diffusive instabilities in sediment-laden systems with applications to riverine outflows

2013-05-29T21:08:23Z

Pburns:

__NOTOC__
={{PAGENAME}}=
==Project description==

When a layer of particle-laden fresh water is placed above clear, saline water, both double-diffusive and Rayleigh-Taylor instabilities may arise. Such a configuration can arise from hypopycnal river outflows into the salty ocean. The presence of these two instabilities can increase the flux of sediment out of the plume beyond that predicted by Stokes settling of individual particles. In addition, the presence of settling particles modifies traditional double-diffusive fingering to create a distinctly different mode. With this motivation in mind, we study the modification of the double-diffusive instability in the presence of settling particles using the tools of linear stability (LS) and direct numerical simulation (DNS).

An important parameter that arises from LS results is the ratio of the unstable layer thickness to the diffusive interface thickness of the salinity profile. When this value is small, the instability eigenmodes primarily resemble double-diffusive modes, while at larger values the sediment and salinity interfaces become increasingly decoupled and the dominant instability mode becomes Rayleigh-Taylor like. Results from DNS show that this parameter quickly grows before plateauing at a constant value for the rest of the simulation. This value is determined solely by the balance between the advective settling flux of sediment into the rose region and the fingering flux out. The balance between the settling and fingering fluxes is characterized by the settling velocity, the salinity Schmidt number and the stability ratio. For settling-dominated situations, we show that the resulting instability mode becomes a phase-locked fingering mode. This mode has the same spectral content as the traditional fingering mode but the large scale convective overturning generated by the Rayleigh-Taylor mode creates a phase-locking that results in very thin, wisp-like plumes released from the base of the unstable layer. Across a large range of parameters, the interfacial sediment flux is seen to scale most appropriately with the pure double-diffusive flux. This is contrary to the traditional method of basing the flux on the Stokes settling velocity. In addition, a flux enhancement coefficient is calculated which corrects the double-diffusive flux in settling-dominated systems.

==Objectives==
* Objective 1
* Objective 2

==Time-line==
Provide (estimated) start date & end date, etc

==Models in use==
Information about models / software you use

==Results==
List the results of your project

==Users==
* [[User:Pburns|Peter Burns]]

==Funding==
This research was supported by NSF grants CBET-0854338, CBET-1067847 and OCE-1061300.

==Publications and presentations==
Burns, P. and Meiburg, E. ''Sediment-laden Fresh Water above Salt Water: Linear Stability analysis.'' J. Fluid Mech. 691. pp 279. (2012) [http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8474654]

==Links==
This would be the place to provide links that are related to your project.

[[Category:Research project]]

HPCCprojects:Double-diffusive instabilities in sediment-laden systems with applications to riverine outflows

2013-05-29T21:06:25Z

Pburns:

__NOTOC__
={{PAGENAME}}=
==Project description==

When a layer of particle-laden fresh water is placed above clear, saline water, both double-diffusive and Rayleigh-Taylor instabilities may arise. Such a configuration can arise from hypopycnal river outflows into the salty ocean. The presence of these two instabilities can increase the flux of sediment out of the plume beyond that predicted by Stokes settling of individual particles. In addition, the presence of settling particles modifies traditional double-diffusive fingering to create a distinctly different mode. With this motivation in mind, we study the modification of the double-diffusive instability in the presence of settling particles using the tools of linear stability (LS) and direct numerical simulation (DNS).

An important parameter that arises from LS results is the ratio of the unstable layer thickness to the diffusive interface thickness of the salinity profile. When this value is small, the instability eigenmodes primarily resemble double-diffusive modes, while at larger values the sediment and salinity interfaces become increasingly decoupled and the dominant instability mode becomes Rayleigh-Taylor like. Results from DNS show that this parameter quickly grows before plateauing at a constant value for the rest of the simulation. This value is determined solely by the balance between the advective settling flux of sediment into the rose region and the fingering flux out. The balance between the settling and fingering fluxes is characterized by the settling velocity, the salinity Schmidt number and the stability ratio. For settling-dominated situations, we show that the resulting instability mode becomes a phase-locked fingering mode. This mode has the same spectral content as the traditional fingering mode but the large scale convective overturning generated by the Rayleigh-Taylor mode creates a phase-locking that results in very thin, wisp-like plumes released from the base of the unstable layer. Across a large range of parameters, the interfacial sediment flux is seen to scale most appropriately with the pure double-diffusive flux. This is contrary to the traditional method of basing the flux on the Stokes settling velocity. In addition, a flux enhancement coefficient is calculated which corrects the double-diffusive flux in settling-dominated systems.

==Objectives==
* Objective 1
* Objective 2

==Time-line==
Provide (estimated) start date & end date, etc

==Models in use==
Information about models / software you use

==Results==
List the results of your project

==Users==
* [[User:Pburns|Peter Burns]]

==Funding==
This research was supported by NSF grants CBET-0854338, CBET-1067847 and OCE-1061300.

==Publications and presentations==
Burns, P. and Meiburg, E. Sediment-laden Fresh Water above Salt Water: Linear Stability analysis. J. Fluid Mech. 691. pp 279. (2012)

==Links==
This would be the place to provide links that are related to your project.

[[Category:Research project]]

HPCCprojects:Double-diffusive instabilities in sediment-laden systems with applications to riverine outflows

2013-05-29T21:01:05Z

Pburns:

__NOTOC__
={{PAGENAME}}=
==Project description==

When a layer of particle-laden fresh water is placed above clear, saline water, both double-diffusive and Rayleigh-Taylor instabilities may arise. Such a configuration can arise from hypopycnal river outflows into the salty ocean. The presence of these two instabilities can increase the flux of sediment out of the plume beyond that predicted by Stokes settling of individual particles. In addition, the presence of settling particles modifies traditional double-diffusive fingering to create a distinctly different mode. With this motivation in mind, we study the modification of the double-diffusive instability in the presence of settling particles using the tools of linear stability (LS) and direct numerical simulation (DNS).

An important parameter that arises from LS results is the ratio of the unstable layer thickness to the diffusive interface thickness of the salinity profile. When this value is small, the instability eigenmodes primarily resemble double-diffusive modes, while at larger values the sediment and salinity interfaces become increasingly decoupled and the dominant instability mode becomes Rayleigh-Taylor like. Results from DNS show that this parameter quickly grows before plateauing at a constant value for the rest of the simulation. This value is determined solely by the balance between the advective settling flux of sediment into the rose region and the fingering flux out. The balance between the settling and fingering fluxes is characterized by the settling velocity, the salinity Schmidt number and the stability ratio. For settling-dominated situations, we show that the resulting instability mode becomes a phase-locked fingering mode. This mode has the same spectral content as the traditional fingering mode but the large scale convective overturning generated by the Rayleigh-Taylor mode creates a phase-locking that results in very thin, wisp-like plumes released from the base of the unstable layer. Across a large range of parameters, the interfacial sediment flux is seen to scale most appropriately with the pure double-diffusive flux. This is contrary to the traditional method of basing the flux on the Stokes settling velocity. In addition, a flux enhancement coefficient is calculated which corrects the double-diffusive flux in settling-dominated systems.

==Objectives==
Objective 1
Objective 2

==Time-line==
Provide (estimated) start date & end date, etc

==Models in use==
Information about models / software you use

==Results==
List the results of your project

==Users==
* [[User:Pburns|Peter Burns]]

==Funding==
Provide your project funding sources including the award number

==Publications and presentations==
This would be the place to list your achievements, journal articles, conference abstracts, etc

==Links==
This would be the place to provide links that are related to your project.

Choose one of the two categories mentioned below, that your project suites the best
[[Category:Lecture project]] [[Category:Research project]]

HPCCprojects:Double-diffusive instabilities in sediment-laden systems with applications to riverine outflows

2013-05-29T20:58:56Z

Pburns:

__NOTOC__
={{PAGENAME}}=
==Project description==

When a layer of particle-laden fresh water is placed above clear, saline water, both double-diffusive and Rayleigh-Taylor instabilities may arise. Such a configuration can arise from hypopycnal river outflows into the salty ocean. The presence of these two instabilities can increase the flux of sediment out of the plume beyond that predicted by Stokes settling of individual particles. In addition, the presence of settling particles modifies traditional double-diffusive fingering to create a distinctly different mode. With this motivation in mind, we study the modification of the double-diffusive instability in the presence of settling particles using the tools of linear stability (LS) and direct numerical simulation (DNS).

An important parameter that arises from LS results is the ratio of the unstable layer thickness to the diffusive interface thickness of the salinity profile. When this value is small, the instability eigenmodes primarily resemble double-diffusive modes, while at larger values the sediment and salinity interfaces become increasingly decoupled and the dominant instability mode becomes Rayleigh-Taylor like. Results from DNS show that this parameter quickly grows before plateauing at a constant value for the rest of the simulation. This value is determined solely by the balance between the advective settling flux of sediment into the rose region and the fingering flux out. The balance between the settling and fingering fluxes is characterized by the settling velocity, the salinity Schmidt number and the stability ratio. For settling-dominated situations, we show that the resulting instability mode becomes a phase-locked fingering mode. This mode has the same spectral content as the traditional fingering mode but the large scale convective overturning generated by the Rayleigh-Taylor mode creates a phase-locking that results in very thin, wisp-like plumes released from the base of the unstable layer. Across a large range of parameters, the interfacial sediment flux is seen to scale most appropriately with the pure double-diffusive flux. This is contrary to the traditional method of basing the flux on the Stokes settling velocity. In addition, a flux enhancement coefficient is calculated which corrects the double-diffusive flux in settling-dominated systems.



==Objectives==

Objective 1
Objective 2


==Time-line==
Provide (estimated) start date & end date, etc

==Models in use==
Information about models / software you use

==Results==
List the results of your project

==Users==
List the CSDMS HPCC users of your project:
* <pebu3391>

==Funding==
Provide your project funding sources including the award number

==Publications and presentations==
This would be the place to list your achievements, journal articles, conference abstracts, etc

==Links==
This would be the place to provide links that are related to your project.

Choose one of the two categories mentioned below, that your project suites the best
[[Category:Lecture project]] [[Category:Research project]]

HPCCprojects:Double-diffusive instabilities in sediment-laden systems with applications to riverine outflows

2013-05-29T20:58:23Z

Pburns:

__NOTOC__
={{PAGENAME}}=
==Project description==


When a layer of particle-laden fresh water is placed above clear, saline water, both double-diffusive and Rayleigh-Taylor instabilities may arise. Such a configuration can arise from hypopycnal river outflows into the salty ocean. The presence of these two instabilities can increase the flux of sediment out of the plume beyond that predicted by Stokes settling of individual particles. In addition, the presence of settling particles modifies traditional double-diffusive fingering to create a distinctly different mode. With this motivation in mind, we study the modification of the double-diffusive instability in the presence of settling particles using the tools of linear stability (LS) and direct numerical simulation (DNS).

An important parameter that arises from LS results is the ratio of the unstable layer thickness to the diffusive interface thickness of the salinity profile. When this value is small, the instability eigenmodes primarily resemble double-diffusive modes, while at larger values the sediment and salinity interfaces become increasingly decoupled and the dominant instability mode becomes Rayleigh-Taylor like. Results from DNS show that this parameter quickly grows before plateauing at a constant value for the rest of the simulation. This value is determined solely by the balance between the advective settling flux of sediment into the rose region and the fingering flux out. The balance between the settling and fingering fluxes is characterized by the settling velocity, the salinity Schmidt number and the stability ratio. For settling-dominated situations, we show that the resulting instability mode becomes a phase-locked fingering mode. This mode has the same spectral content as the traditional fingering mode but the large scale convective overturning generated by the Rayleigh-Taylor mode creates a phase-locking that results in very thin, wisp-like plumes released from the base of the unstable layer. Across a large range of parameters, the interfacial sediment flux is seen to scale most appropriately with the pure double-diffusive flux. This is contrary to the traditional method of basing the flux on the Stokes settling velocity. In addition, a flux enhancement coefficient is calculated which corrects the double-diffusive flux in settling-dominated systems.



==Objectives==

Objective 1
Objective 2


==Time-line==
Provide (estimated) start date & end date, etc

==Models in use==
Information about models / software you use

==Results==
List the results of your project

==Users==
List the CSDMS HPCC users of your project:
* <pebu3391>

==Funding==
Provide your project funding sources including the award number

==Publications and presentations==
This would be the place to list your achievements, journal articles, conference abstracts, etc

==Links==
This would be the place to provide links that are related to your project.

Choose one of the two categories mentioned below, that your project suites the best
[[Category:Lecture project]] [[Category:Research project]]

HPCCprojects:Double-diffusive instabilities in sediment-laden systems with applications to riverine outflows

2013-05-29T20:56:42Z

Pburns: Created page with "<!-- How to create a new "HPCCproject" page: 1) Log in to the wiki 2) Create a new page for each HPCCproject, by using the following URL: * http://csdms.colorado.edu/wiki/H..."

__NOTOC__
={{PAGENAME}}=
==Project description==

When a layer of particle-laden fresh water is placed above clear, saline water, both double-diffusive and Rayleigh-Taylor instabilities may arise. Such a configuration can arise from hypopycnal river outflows into the salty ocean. The presence of these two instabilities can increase the flux of sediment out of the plume beyond that predicted by Stokes settling of individual particles. In addition, the presence of settling particles modifies traditional double-diffusive fingering to create a distinctly different mode. With this motivation in mind, we study the modification of the double-diffusive instability in the presence of settling particles using the tools of linear stability (LS) and direct numerical simulation (DNS).

An important parameter that arises from LS results is the ratio of the unstable layer thickness to the diffusive interface thickness of the salinity profile. When this value is small, the instability eigenmodes primarily resemble double-diffusive modes, while at larger values the sediment and salinity interfaces become increasingly decoupled and the dominant instability mode becomes Rayleigh-Taylor like. Results from DNS show that this parameter quickly grows before plateauing at a constant value for the rest of the simulation. This value is determined solely by the balance between the advective settling flux of sediment into the rose region and the fingering flux out. The balance between the settling and fingering fluxes is characterized by the settling velocity, the salinity Schmidt number and the stability ratio. For settling-dominated situations, we show that the resulting instability mode becomes a phase-locked fingering mode. This mode has the same spectral content as the traditional fingering mode but the large scale convective overturning generated by the Rayleigh-Taylor mode creates a phase-locking that results in very thin, wisp-like plumes released from the base of the unstable layer. Across a large range of parameters, the interfacial sediment flux is seen to scale most appropriately with the pure double-diffusive flux. This is contrary to the traditional method of basing the flux on the Stokes settling velocity. In addition, a flux enhancement coefficient is calculated which corrects the double-diffusive flux in settling-dominated systems.



==Objectives==

Objective 1
Objective 2


==Time-line==
Provide (estimated) start date & end date, etc

==Models in use==
Information about models / software you use

==Results==
List the results of your project

==Users==
List the CSDMS HPCC users of your project:
* <name HPCCuser>

==Funding==
Provide your project funding sources including the award number

==Publications and presentations==
This would be the place to list your achievements, journal articles, conference abstracts, etc

==Links==
This would be the place to provide links that are related to your project.

Choose one of the two categories mentioned below, that your project suites the best
[[Category:Lecture project]] [[Category:Research project]]

Meeting:Abstract 2011 CSDMS meeting-026

2011-10-07T16:38:02Z

Pburns:

{{CSDMS meeting personal information template
|CSDMS meeting first name=Peter
|CSDMS meeting last name=Burns
|CSDMS meeting institute=UC - Santa Barbara
|CSDMS meeting city=Santa Barbara
|CSDMS meeting state=California
|CSDMS meeting country=USA
|CSDMS meeting email address=pburns0423@gmail.com
|CSDMS meeting phone=240-413-1074
}}
{{CSDMS meeting abstract yes no
|CSDMS meeting abstract submit=Yes
}}
{{CSDMS meeting abstract title template
|CSDMS meeting abstract title=Instabilities in particle-laden systems
}}
{{CSDMS meeting authors template
|CSDMS meeting coauthor first name abstract=Eckart
|CSDMS meeting coauthor last name abstract=Meiburg
|CSDMS meeting coauthor institute / Organization=UC - Santa Barbara
|CSDMS meeting coauthor town-city=Santa Barbara
|State=California
|CSDMS meeting coauthor country=USA
|CSDMS meeting coauthor email address=meiburg@engineering.ucsb.edu
}}
{{CSDMS meeting abstract template
|CSDMS meeting abstract=When a layer of particle-laden fresh water is placed above clear, saline water, both Rayleigh-Taylor and double-diffusive instabilities may arise. In the absence of salinity, the dominant parameter is the ratio of the particle settling velocity to the viscous velocity scale. As long as this ratio is small, particle settling has a negligible influence on the instability growth. However, when the particles settle more rapidly than the instability grows, the growth rate decreases inversely proportional to the settling velocity. In the presence of a stably stratified salinity field, this picture changes dramatically. An important new parameter is the ratio of the height of the nose region that contains both salt and particles to the thickness of the salinity interface. If this ratio is small (large) the dominant instability mechanism will be double-diffusive (Rayleigh-Taylor) dominant. In contrast to situations without salinity, particle settling can have a destabilizing effect and significantly increase the growth rate. Scaling laws obtained from the linear stability results are seen to be consistent with experimental observations and theoretical arguments put forward by other authors.
}}
{{blank line template}}
{{CSDMS meeting program template1
|CSDMS meeting first day choice=Geo-Modeling
|CSDMS meeting second day choice=VisIt
|CSDMS meeting third day choice=ROMS - CSTMS
}}
{{CSDMS meeting logistics template
|Attend all days=Yes
|CSDMS arrange hotel=Yes
|Check in date=2011/10/28
|Check out date=2011/10/30
|Share a room=Yes
|First name roommate=Zachary
|Last name roommate=Borden
|CSDMS meeting dinner=No
|CSDMS meeting funding=Registration, Air travel, Lodging, Per diem
|CSDMS registration support=Not Sure
|CSDMS airtravel support=Not Sure
|CSDMS lodging support=Not Sure
|CSDMS perdiem support=Fully
}}

Meeting:Abstract 2011 CSDMS meeting-026

2011-10-05T17:00:01Z

Pburns:

Meeting:Abstract 2011 CSDMS meeting-026

2011-08-30T18:27:50Z

Pburns:

{{CSDMS meeting personal information template
|CSDMS meeting first name=Peter
|CSDMS meeting last name=Burns
|CSDMS meeting institute=UC - Santa Barbara
|CSDMS meeting city=Santa Barbara
|CSDMS meeting state=California
|CSDMS meeting country=USA
|CSDMS meeting email address=pburns0423@gmail.com
|CSDMS meeting phone=240-413-1074
}}
{{CSDMS meeting abstract yes no
|CSDMS meeting abstract submit=Yes
}}
{{CSDMS meeting abstract title template}}
{{CSDMS meeting abstract template}}
{{blank line template}}
{{CSDMS meeting program template
|CSDMS meeting first hydrological choice=MODFLOW
|CSDMS meeting first terrestrial choice=I am not interested
|CSDMS meeting first coastal choice=Delft3D
|CSDMS meeting first marine choice=ROMS
|CSDMS meeting second marine choice=TURBINS
|CSDMS meeting first carbonate choice=I am not interested
|CSDMS meeting first tool choice=GRASS
}}
{{CSDMS meeting logistics template
|Attend all days=Yes
|CSDMS arrange hotel=Yes
|Check in date=2011/10/28
|Check out date=2011/10/30
|Share a room=Yes
|First name roommate=Zachary
|Last name roommate=Borden
|CSDMS meeting dinner=No
|CSDMS meeting funding=Registration, Air travel, Lodging, Per diem
|CSDMS registration support=Not Sure
|CSDMS airtravel support=Not Sure
|CSDMS lodging support=Not Sure
|CSDMS perdiem support=Fully
}}

Meeting:Abstract 2011 CSDMS meeting-026

2011-08-25T18:37:29Z

Pburns:

{{#ifeq:{{#expr:{{#time: U}}>{{#expr:
{{#expr:{{#switch: {{#sub:{{REVISIONTIMESTAMP}}|4|-8}}
| 7 = 1309478400
| 8 = 1312156800
| 9 = 1314835200
| 10 = 1317427200
}} + {{#expr:{{#sub:{{REVISIONTIMESTAMP}}|6|-6}}*24*3600}} + {{#expr:{{#sub:{{REVISIONTIMESTAMP}}|8|-4}}*3600}} + {{#expr:{{#sub:{{REVISIONTIMESTAMP}}|10|-2}} *60}} + {{#sub:{{REVISIONTIMESTAMP}}|12}} -64800}}+30 }} }}|1|{{CSDMS meeting 2011 paid}}|{{CSDMS meeting 2011 not paid}} }} 
{{CSDMS meeting personal information template
|CSDMS meeting first name=Peter
|CSDMS meeting last name=Burns
|CSDMS meeting institute=UC - Santa Barbara
|CSDMS meeting city=Santa Barbara
|CSDMS meeting state=California
|CSDMS meeting country=USA
|CSDMS meeting email address=pburns0423@gmail.com
|CSDMS meeting phone=240-413-1074
}}
{{CSDMS meeting abstract yes no
|CSDMS meeting abstract submit=Yes
}}
{{CSDMS meeting abstract title template}}
{{CSDMS meeting abstract template}}
{{blank line template}}
{{CSDMS meeting program template
|CSDMS meeting first hydrological choice=MODFLOW
|CSDMS meeting first terrestrial choice=I am not interested
|CSDMS meeting first coastal choice=Delft3D
|CSDMS meeting first marine choice=ROMS
|CSDMS meeting second marine choice=TURBINS
|CSDMS meeting first carbonate choice=I am not interested
|CSDMS meeting first tool choice=GRASS
}}
{{CSDMS meeting logistics template
|Attend all days=Yes
|CSDMS arrange hotel=Yes
|Check in date=2011/10/28
|Check out date=2011/10/30
|Share a room=Yes
|CSDMS meeting dinner=No
|CSDMS meeting funding=Registration, Air travel, Lodging, Per diem
|CSDMS registration support=Not Sure
|CSDMS airtravel support=Not Sure
|CSDMS lodging support=Not Sure
|CSDMS perdiem support=Fully
}}

Meeting:Abstract 2011 CSDMS meeting-026

2011-08-24T20:50:37Z

Pburns:

{{#ifeq:{{#expr:{{#time: U}}>{{#expr:
{{#expr:{{#switch: {{#sub:{{REVISIONTIMESTAMP}}|4|-8}}
| 7 = 1309478400
| 8 = 1312156800
| 9 = 1314835200
| 10 = 1317427200
}} + {{#expr:{{#sub:{{REVISIONTIMESTAMP}}|6|-6}}*24*3600}} + {{#expr:{{#sub:{{REVISIONTIMESTAMP}}|8|-4}}*3600}} + {{#expr:{{#sub:{{REVISIONTIMESTAMP}}|10|-2}} *60}} + {{#sub:{{REVISIONTIMESTAMP}}|12}} -64800}}+30 }} }}|1|{{CSDMS meeting 2011 paid}}|{{CSDMS meeting 2011 not paid}} }} 
{{CSDMS meeting personal information template
|CSDMS meeting first name=Peter
|CSDMS meeting last name=Burns
|CSDMS meeting institute=UC - Santa Barbara
|CSDMS meeting city=Santa Barbara
|CSDMS meeting state=California
|CSDMS meeting country=USA
|CSDMS meeting email address=pburns0423@gmail.com
|CSDMS meeting phone=240-413-1074
}}
{{CSDMS meeting abstract yes no
|CSDMS meeting abstract submit=Yes
}}
{{CSDMS meeting abstract title template}}
{{CSDMS meeting abstract template}}
{{blank line template}}
{{CSDMS meeting program template
|CSDMS meeting first hydrological choice=MODFLOW
|CSDMS meeting first terrestrial choice=I am not interested
|CSDMS meeting first coastal choice=Delft3D
|CSDMS meeting first marine choice=ROMS
|CSDMS meeting second marine choice=TURBINS
|CSDMS meeting first carbonate choice=I am not interested
|CSDMS meeting first tool choice=GRASS
}}
{{CSDMS meeting logistics template
|Attend all days=Yes
|CSDMS arrange hotel=Yes
|Check in date=2011/10/27
|Check out date=2011/10/30
|Share a room=Yes
|CSDMS meeting dinner=No
}}

Meeting:Abstract 2011 CSDMS meeting-026

2011-08-24T20:49:56Z

Pburns: Created page with " {{#ifeq:{{#expr:{{#time: U}}>{{#expr: {{#expr:{{#switch: {{#sub:{{REVISIONTIMESTAMP}}|4|-8}} | 7 = 1309478400 | 8 = 1312156800 | 9 = 1314835200 | 10 = 1317427200 }} + {{#expr:{{..."

{{#ifeq:{{#expr:{{#time: U}}>{{#expr:
{{#expr:{{#switch: {{#sub:{{REVISIONTIMESTAMP}}|4|-8}}
| 7 = 1309478400
| 8 = 1312156800
| 9 = 1314835200
| 10 = 1317427200
}} + {{#expr:{{#sub:{{REVISIONTIMESTAMP}}|6|-6}}*24*3600}} + {{#expr:{{#sub:{{REVISIONTIMESTAMP}}|8|-4}}*3600}} + {{#expr:{{#sub:{{REVISIONTIMESTAMP}}|10|-2}} *60}} + {{#sub:{{REVISIONTIMESTAMP}}|12}} -64800}}+30 }} }}|1|{{CSDMS meeting 2011 paid}}|{{CSDMS meeting 2011 not paid}} }} 
{{CSDMS meeting personal information template
|CSDMS meeting first name=Peter
|CSDMS meeting last name=Burns
|CSDMS meeting institute=UC - Santa Barbara
|CSDMS meeting city=Santa Barbara
|CSDMS meeting state=California
|CSDMS meeting country=USA
|CSDMS meeting email address=pburns0423@gmail.com
|CSDMS meeting phone=240-413-1074
}}
{{CSDMS meeting abstract yes no
|CSDMS meeting abstract submit=Yes
}}
{{CSDMS meeting abstract title template}}
{{CSDMS meeting abstract template}}
{{blank line template}}
{{CSDMS meeting program template
|CSDMS meeting first hydrological choice=MODFLOW
|CSDMS meeting first terrestrial choice=I am not interested
|CSDMS meeting first coastal choice=Delft3D
|CSDMS meeting first marine choice=ROMS
|CSDMS meeting second marine choice=TURBINS
|CSDMS meeting first carbonate choice=I am not interested
|CSDMS meeting first tool choice=GRASS
}}
{{CSDMS meeting logistics template
|Attend all days=Yes
|CSDMS arrange hotel=Yes
|Check in date=2011/10/27
|Check out date=2011/10/30
|Share a room=Yes
|CSDMS meeting dinner=No
}}

Model:SISV

2010-09-13T19:32:49Z

Pburns:

{{Modeler information
|First name=Peter
|Last name=Burns
|Type of contact=Model developer
|Institute / Organization=UCSB
|Postal address 1=Engr II Bldg, Room 2355
|Postal address 2=Dept of Mechanical Engr
|Town / City=Santa Barbara
|Postal code=93106
|State=California
|Country=USA
|Email address=pburns@umail.ucsb.edu
}}
{{Model identity
|Model type=Single
|Spatial dimensions=2D
|One-line model description=2D simulation of the Navier Stokes equations
|Extended model description=Solves the 2D Navier-Stokes equations in a pseudo-spectral method.
}}
{{Model technical information
|Supported platforms=Unix, Linux, Mac OS
|Programming language=C++
|Code optimized=Parallel
Computing
|Start year development=2009
|Does model development still take place?=Yes
|Model availability=As code
|Source code availability=Through owner
|Program license type=GPL v2
|OpenMI compliant=No but possible
|CCA component=No but possible
|IRF interface=No but possible
|Memory requirements=5M nodes ~ 1GB
}}
{{Input - Output description
|Describe input parameters=Described in text files usr_input.txt and usr_IC.txt. Used to specify flow parameters (Re, Vs, ...), geometrical parameters (Lx, Ly, ...) and solver parameters (Nx, Ny)
|Input format=ASCII
|Describe output parameters=Typical flow quantities: Velocities, Concentrations, Vorticity, Passive marker location
|Output format=Binary
|Pre-processing software needed?=No
|Post-processing software needed?=Yes
|Describe post-processing software=Simply need to load the data into matlb using fread, data loading files and provided
|Visualization software needed?=Yes
|If above answer is yes=Matlab
}}
{{Process description model
|Describe processes represented by the model=Many 2D flow situation with simple boundary conditions (ie no inflow or outflow). suitable for lock/exchange simulation of gravity/turbidity currents or to study stability properties of stratified flow.
|Describe key physical parameters and equations=Incompressible flow equations: Navier-Stokes with Boussinesq approximations. Transport equation to describe the motion of particles (or Salanity or Temperature).
|Describe length scale and resolution constraints=Since we are doing DNS, we are restricted to low Reynolds numbers. Up to ~50,000 or possibly higher but very slow.
}}
{{Model testing}}
{{Users groups model}}
{{Documentation model
|Manual model available=No
}}
{{Additional comments model}}


<h2>Introduction</h2>
<h2> History </h2>
<h2> Papers </h2>
<h2> Issues </h2>
<h2> Help </h2>
<h2> Input Files </h2>
<h2> Output Files </h2>
<h2> Download </h2>
<h2> Source </h2>

Model:SISV

2010-09-13T19:29:55Z

Pburns: Created page with '{{Modeler information |First name=Peter |Last name=Burns |Type of contact=Model developer |Institute / Organization=UCSB |Postal address 1=Engr II Bldg, Room 2355 |Postal address…'

{{Modeler information
|First name=Peter
|Last name=Burns
|Type of contact=Model developer
|Institute / Organization=UCSB
|Postal address 1=Engr II Bldg, Room 2355
|Postal address 2=Dept of Mechanical Engr
|Town / City=Santa Barbara
|Postal code=93106
|State=California
|Country=USA
|Email address=pburns@umail.ucsb.edu
}}
{{Model identity
|Spatial dimensions=2D
|One-line model description=2D simulation of the Navier Stokes equations
|Extended model description=Solves the 2D Navier-Stokes equations in a pseudo-spectral method.
}}
{{Model technical information
|Supported platforms=Unix, Linux, Mac OS
|Programming language=C++
|Code optimized=Parallel
Computing
|Start year development=2009
|Does model development still take place?=Yes
|Model availability=As code
|Source code availability=Through owner
|Program license type=GPL v2
|OpenMI compliant=No but possible
|CCA component=No but possible
|IRF interface=No but possible
|Memory requirements=5M nodes ~ 1GB
}}
{{Input - Output description
|Describe input parameters=Described in text files usr_input.txt and usr_IC.txt. Used to specify flow parameters (Re, Vs, ...), geometrical parameters (Lx, Ly, ...) and solver parameters (Nx, Ny)
|Input format=ASCII
|Describe output parameters=Typical flow quantities: Velocities, Concentrations, Vorticity, Passive marker location
|Output format=Binary
|Pre-processing software needed?=No
|Post-processing software needed?=Yes
|Describe post-processing software=Simply need to load the data into matlb using fread, data loading files and provided
|Visualization software needed?=Yes
|If above answer is yes=Matlab
}}
{{Process description model
|Describe processes represented by the model=Many 2D flow situation with simple boundary conditions (ie no inflow or outflow). suitable for lock/exchange simulation of gravity/turbidity currents or to study stability properties of stratified flow.
|Describe key physical parameters and equations=Incompressible flow equations: Navier-Stokes with Boussinesq approximations. Transport equation to describe the motion of particles (or Salanity or Temperature).
|Describe length scale and resolution constraints=Since we are doing DNS, we are restricted to low Reynolds numbers. Up to ~50,000 or possibly higher but very slow.
}}
{{Model testing}}
{{Users groups model}}
{{Documentation model
|Manual model available=No
}}
{{Additional comments model}}

==Introduction==

== History ==

== Papers ==

== Issues ==

== Help ==

== Input Files ==

== Output Files ==

== Download ==

== Source ==

User:Pburns

2010-04-28T21:18:32Z

Pburns:

{{Signup information member
|First name member=Peter
|Last name member=Burns
|Institute member=UCSB
|Department member=Mechanical Engineering
|Postal address 1 member=7630 Dartmoor Ave
|City member=Goleta
|Postal code member=93117
|State member=California
|Country member=USA
|Confirm email member=pburns@umail.ucsb.edu
|Working group member=Cyberinformatics and Numerics Working Group
|Focus research group member=Hydrology Focus Research Group
}}