Movie:Complex Flow at Channel Confluence: Difference between revisions
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{{Attribute movie1 | {{Attribute movie1 | ||
|Movie domain = terrestrial, hydrology | |Movie domain=terrestrial, hydrology | ||
}} | }} | ||
{{Attribute movie2 | {{Attribute movie2 | ||
|Movie keywords = River confluence | |Movie keywords=River confluence | ||
}} | }} | ||
{{Attribute movie2 | {{Attribute movie2 | ||
|Movie keywords = Eddy simulations | |Movie keywords=Eddy simulations | ||
}} | }} | ||
{{Attribute movie3 | {{Attribute movie3 | ||
|Animation model name = 3D Detached Eddy Simulations | |Animation model name=3D Detached Eddy Simulations | ||
|First name contributor=George | |First name contributor=George | ||
|Last name contributor =Constantinescu | |Last name contributor=Constantinescu | ||
|Location movie=small river confluence in Illinois | |Location movie=small river confluence in Illinois | ||
|Timespan movie=Minutes | |Timespan movie=Minutes | ||
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{{Movie description | {{Movie description | ||
|Grade level=Graduate / Professional | |Grade level=Graduate / Professional | ||
|One-line movie description = Forming of eddies in the mixing interface | |One-line movie description=Forming of eddies in the mixing interface | ||
|Extended movie description=The movie shows a small river confluence in Illinois. The figure shows the bathymetry and dimensions, it is a small system (~8 m wide, 0.65m deep). It is an asymmetrical confluence with concordant bed, the velocity and momentum (rQU) ratios are ~1.0. In that case, the mixing layer development is driven by difference in directions of the streams. Other simulation conditions are: - Re~166,000 (D=0.4m U=0.44 m/s), Fr=0.24 - Maximum scour depth 2.92D | |Extended movie description=The movie shows a small river confluence in Illinois. The figure shows the bathymetry and dimensions, it is a small system (~8 m wide, 0.65m deep). It is an asymmetrical confluence with concordant bed, the velocity and momentum (rQU) ratios are ~1.0. In that case, the mixing layer development is driven by difference in directions of the streams. Other simulation conditions are: - Re~166,000 (D=0.4m U=0.44 m/s), Fr=0.24 - Maximum scour depth 2.92D | ||
Latest revision as of 16:19, 21 June 2017
Information Page: Complex Flow at Channel Confluence
Play Animation
Complex Flow at Channel Confluence
Key Attributes
| Domain: | terrestrial, hydrology |
| Keywords: | River confluence |
| Keywords: | Eddy simulations |
| Model name: | 3D Detached Eddy Simulations |
| Name: | George, Constantinescu |
| Where: | small river confluence in Illinois |
| When: | Minutes |
Short Description
Grade level: Graduate / Professional
Statement: Forming of eddies in the mixing interface
Abstract: The movie shows a small river confluence in Illinois. The figure shows the bathymetry and dimensions, it is a small system (~8 m wide, 0.65m deep). It is an asymmetrical confluence with concordant bed, the velocity and momentum (rQU) ratios are ~1.0. In that case, the mixing layer development is driven by difference in directions of the streams. Other simulation conditions are: - Re~166,000 (D=0.4m U=0.44 m/s), Fr=0.24 - Maximum scour depth 2.92D
In the movie, obvious eddies develop at the mixing interface, they propagate downstream, complete mixing is not reached in the simulated stretch.
Theory
River confluence example
Confluences are a common element of river networks, especially in the lower reaches and the deltaic floodplain. They are characterized by large-scale turbulent motions. Confluences are even more common in braided river networks, and play an important role in reworking and transporting bedload material.
Links
References
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