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when modeling sediment in my concrete channel, the water level condition that I impose does not meet, exceeds the level.

My conditions are:
at the inlet: Flow (Q)
at the outlet: Flow rate and water level (Q and H). I need 50% of the flow of water entering the cannel.

The depth of the channel is 0.2 m. and exceeds the water level.

Thanks

yeseniasiancas wrote:

Hello,
Your problem seems to be ill-posed, as your hydrodynamics boundary conditions probably are incorrectly specified.
What kind of flow do you expect to have in your numerical simulation? If your flow is subcritical (Froude number < 1) then you should be imposed Q at inflow and a water surface elevation H at the outlet. If your flow is expected to be supercritical (Froude number > 1), then you impose Q and H at the inflow and leave the boundary open for the outlet. Please take a look to the Telemac-2d cases bumpflu and bumpcri.

After solving that, then move to the sediment transport/bed evolution steps.

I hope it helps,

Best wishes,

Pablo

Hi, Pablo

My edge conditions at the channel output are Q and H, so I need 50% of the input flow to come out. Specify first that the output condition is H, but my discharge flow did not reach 50% of the input flow, that is why I choose Q and H, but when modeling sediments exceeds the level.

Thanks for your help.