TELEMAC-MASCARET Forum: Steady state in the presence of wind (1/1)

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TOPIC: Steady state in the presence of wind

Steady state in the presence of wind 9 years 2 months ago #18313

m.mahgoob OFFLINE Senior Boarder Posts: 106	Hello, Do we reach a steady state condition in the presnece of wind?
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Steady state in the presence of wind 9 years 2 months ago #18323

jmhervouet

Hello,

Very general question... very general answer. In 3D with wind you will always have movement in 3D (whereas in 2D you can reach a situation where nothing moves, though often some breaking of symmetry also triggers movements). But your question is on steady state, and it probably depends on the case, but generally speaking we should get a steady state, it is what we got in a series of test cases done recently, including stratifications.

With best regards,

Jean-Michel Hervouet

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Steady state in the presence of wind 9 years 2 months ago #18340

m.mahgoob OFFLINE Senior Boarder Posts: 106	Thank you very much for your reply
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Steady state in the presence of wind 9 years 2 months ago #18341

pilou1253
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openTELEMAC Guru
Posts: 584
Thank you received: 106

Hi!

I made some tests and I found that you reach steady state very quickly on a simple flume model. When modelling a real case with a complex geometry (see image below), steady state can also be reached, but you have to be patient (and maybe tolerate some small fluctuations on your velocity vectors). I did not have inflow into my model, only wind forcing with two open boundaries (water level). I only have a desktop machine (8 CPU), so I guess my steady state would have been even more "steady" with for example 24 CPU or a HPC (unfortunately I have to deal with time constraints...).

Best regards
PL