Model:TwoPhaseEulerSedFoam

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TwoPhaseEulerSedFoam

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Summary Contact Technical specs In/Output Process Testing Other Component info Also known as SedFoam Model type Modular Model part of larger framework Note on status model Date note status model Incorporated models or components: Spatial dimensions 3D Spatial extent Patch-Scale, Grain-Scale Model domain One-line model description A four-way coupled two-phase Eulerian model for sediment transport Extended model description A multi-dimensional numerical model for sediment transport based on the two-phase flow formulation is developed. With closures of particle stresses and fluid-particle interaction, the model is able to resolve processes in the concentrated region of sediment transport and hence does not require conventional bedload/suspended load assumptions. The numerical model is developed in three spatial dimensions. However, in this version, the model is only validated for Reynolds-averaged two-dimensional vertical (2DV) formulation (with the k − epsilon closure for carrier flow turbulence) for sheet flow in steady and oscillatory flows. This numerical model is developed via the open-source CFD library of solvers, OpenFOAM and the new solver is called twoPhaseEulerSedFoam. Keywords: sediment transport, two-phase model, multi-dimensional, Name Zhen Cheng Type of contact Model developer Institute / Organization Ocean Engineering Lab, University of Delaware Postal address 1 259 Academy Street Postal address 2 Town / City Newark Postal code 19716 State Delaware Country United States Email address zcheng@udel.edu Phone +1 (302)4196006 Fax Name Tian-Jian Hsu Type of contact Model developer Institute / Organization Ocean Engineering Lab, University of Delaware Postal address 1 259 Academy St. Postal address 2 Town / City Newark Postal code 19716 State Delaware Country United States Email address thsu@udel.edu Phone +1 (302) 831-4172 Fax Supported platforms Unix, Linux, Mac OS, Windows Other platform Programming language C++ Other program language Code optimized Single Processor, Multiple Processors Multiple processors implemented Distributed memory Nr of distributed processors Nr of shared processors Start year development 2011 Does model development still take place? Yes If above answer is no, provide end year model development Code development status When did you indicate the 'code development status'? Model availability As code Source code availability (Or provide future intension) Through CSDMS repository Source web address Source csdms web address https://github.com/csdms-contrib/twophaseeulersedfoam Program license type CDDL Program license type other Memory requirements Typical run time one day for typical 50,000 grid points using 1 processor, model scalability has been tested to be very good. Describe input parameters flow forcing; sediment properties ( density, grain size, etc.); fluid properties; coefficients for carrier fluid turbulence, and parameters for kinetic theory for granular flow; model selection for kinetic theory, such as granular pressure, conductivity, and viscosity model, etc. More details are described in the user maunal. Input format ASCII Other input format Describe output parameters sediment concentration (alpha); carrier fluid turbulence (k, epsilon); granular temperature (Theta); fluid pressure (p); sediment and fluid velocities (Ua, Ub); turbulence modulation factor (tmf); particle pressure ( kinetic part, pa), more details are described in the user maunal. Output format ASCII Other output format Pre-processing software needed? No Describe pre-processing software Post-processing software needed? No Describe post-processing software Visualization software needed? No If above answer is yes Other visualization software Describe processes represented by the model Sediment transport under steady channel flow, oscillatory flow (sinusoidal and Stokes 2nd order waves) Describe key physical parameters and equations please see more details in the user manual Describe length scale and resolution constraints domain needs to be large enough to capture the boundary layer, and the resolution ( on the order of grain size) should be fine enough to capture the sediment-fluid interaction near the bed level. Describe time scale and resolution constraints The flow should be run to be fully developed, and this time scale depends on the time scale of sediment settling time, and flow periods. the time step should be fine enough not to cause numerical instability, and also capture the varying the flow forcing. Describe any numerical limitations and issues This model is only tested in rectangle domains, and compared the results with idealized experiments; Sediment bed state is affected by the initial condition (mainly due to the frictional stess closure in this model). For 2D or 3D runs, it is suggested that first run 1DV to steady or quasi-steady state, and map the 1DV results to 2DV or 3D, in this way, the initial instability of the sediment bed can be avoided. Describe available calibration data sets Experiment data for steady channel flow can be found in: Sumer, B. M., Kozakiewicz, A., Fredsoe, J., Deigaard, R., 1996. Velocity and concentration profiles in sheet-flow layer of movable bed. Journal of Hydraulic Engineering, (1996) 549-558. Experiment for oscillatory flow can be found in: O'Donoghue, T., Wright, S., 2004. Concentrations in oscillatory sheet flow for well sorted and graded sands. Coastal Engineering 50 (2004) 117-138. Upload calibration data sets if available: Describe available test data sets Upload test data sets if available: Describe ideal data for testing Do you have current or future plans for collaborating with other researchers? Is there a manual available? Yes Upload manual if available: Media:User Manual.pdf Model website if any Model forum / discussion board Comments This part will be filled out by CSDMS staff OpenMI compliant No not possible BMI compliant No not possible WMT component Not yet"Not yet" is not in the list (Yes, In progress, No but possible, No not possible) of allowed values for the "Code CMT compliant or not" property. PyMT component Is this a data component Can be coupled with:

Model info Authors Zhen Cheng Hsu Source code View in CSDMS GitHub repository Model citations Nr. of publications: -- Total citations: 0 h-index: --"--" is not a number. m-quotient: 0 QR-code Link to this page Other models by author FineSed3D TwoPhaseEulerSedFoam

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