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How to use PatchBC

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Old   March 28, 2022, 03:51
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Felix S.
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Hello,

since I am also interested in the PatchBC I tested some stuff with 22.03.

Mainly, I am interested in the prescriptions of water depth.

So I tried B 413, B 418 and B 422 with the test case that was provided with B 441 1 4 0.55 0.65 0.25 0.35 0.25 0.35, the rectangular patch description.

For B 418 1 1: I see nothing happening in the simulation.
For B 413 1 0.35 and For B 422 1 1 I see the water level changing on the boundary, but no in- or outflow (also see the picture, the velocity is nearly at zero everywhere). Maybe I am just using it wrong, but I thought the velocity would then be prescribed by a gradient of zero.

I have attached the control files, the hydrograph_FSF_1.dat (just some arbitrary sinusoidal wave with h=0.3\pm0.05) and an example picture of the water depth.

Thanks for the explanations in advance!
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Old   March 28, 2022, 06:08
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Hans Bihs
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Hello Felix,

yes, you also need to describe the velocities. Either directly or through the current input. I guess you want to run this for waves? There will be a patchBC implementation for waves very soon. The focus there will be on multiple wave generation locations with each having their own wave input.
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Old   March 28, 2022, 06:40
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Felix S.
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Okay, thanks for the clarification on the velocity prescription! Yeah, wanted to try whether this works for waves. Looking forward to the implementation in the future!


Thanks for your work!
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