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| <div class="title">Suspended Sediment Test in Channel</div> | | <div class="title">Suspended Sediment Test in Channel</div> |
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| This case provides a fundamental check of the ability of a model to 1) represent a simple flow, 2) flux material from the bed, and 3) develop a suspended-sediment profile.
| | The previous contents of this page have been move to their proper location: [[TEST_CHAN_CASE]]. |
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| [[Image:Test_case_1.gif|center]] | |
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| ==Domain==
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| The model domain is a long, narrow rectangular box, with a flat bottom.
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| {| border="1"
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| !Model Parameter
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| !Variable
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| !Value
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| |-
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| |Length
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| |<math>l</math>
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| |10000 m
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| |-
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| |Width
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| |<math>w</math>
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| |1000 m
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| |-
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| |Temperature
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| |<math>T</math>
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| |<math>20^{o} C</math>
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| |}
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| ==Bottom Sediment==
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| {| border="1"
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| !Model Parameter
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| ! Variable
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| ! Value
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| |-
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| |Size
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| |<math>D_{50}</math>
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| |0.15 mm
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| |-
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| |Density
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| |<math>\rho_{s}</math>
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| |<math>2650 \,kg/m^{3}</math>
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| |-
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| |Settling Velocity
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| |<math>w_{s}</math>
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| |0.001 m/s
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| |-
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| |Critical Shear Stress
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| |<math>\tau_{c}</math>
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| |<math>0.05 \,N/m^{2}</math>
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| |-
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| |Porosity
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| |<math>\phi</math>
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| |0.90
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| |}
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| An infinite supply of sediment (not erosion, no armoring) is used.
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| ==Forcing==
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| Inflow boundary condition only <br>
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| No rotation <math>(f=0)</math><br>
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| No wind<br>
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| No heating/cooling<br>
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| ==Boundary Conditions==
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| Inflow maintained as steady flow, depth-mean flow <math><u> = 1 \,m/s </math><br>
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| Outflow = open <br>
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| Sides = walls with no fluxes, no friction <br>
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| Bottom roughness <math>Z_{0} = 0.005</math> <br>
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| Sediment flux calculated by model <br>
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| Surface = free surface, no fluxes <br>
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| ==Analysis Data==
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| Velocity profile at x = 8000 m <br>
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| Suspended sediment profile at x = 8000 m <br>
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| Time series of net rate of sediment flux from bed and/or concentration at specified levels <br>
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| ==Physical Constants==
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| Gravitational acceleration <math>g \,= \,9.81 m/s^{2}</math><br>
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| Von Karman's constant <math>\kappa \,= \,0.41</math><br>
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| Water density <math>\rho_{w} \,= \,998 kg/m^{3}</math><br>
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| Dynamic viscosity (and minimum diffusivity)<math>\nu \,= \,1e-6 \,m^{2}/s</math><br>
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| '''Note:''' If a model incorporates physical constants that differ from these, and/or automatically calculates some values specified here, please specify the values used.
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| ==Results==
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| {|border="1"
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| !
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| !<math>\partial\eta\backslash\partial x</math>
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| !<math> u^{*} (m^{2}\backslash s^{2})</math>
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| |-
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| |calculated
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| |4.00e-5
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| |0.0625
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| |-
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| |ANA
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| |4.21e-5
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| |0.0643
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| |-
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| |<math>\kappa-\varepsilon</math>
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| |3.98e-5
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| |0.0626
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| |-
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| |MY25
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| |3.00e-5
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| |0.0544
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| |}
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