Sinusoidal pressure distribution on wall boundary

[st268]

Hello,

Is it possible to use a sinusoidal static pressure distribution on a wall boundary? I am looking at wave/current interactions and would like to pseudo-represent the free surface this way.

I am currently using v3.3 but can upgrade to v4 if it is only available in that version.

Thanks in advance for any help!

Susan

[Yvan Fournier]

Hello,

I don't see how you could do this "directly", but you may have workarounds:

- use ALE mesh deformation, and adpat the mesh movement to force this
- use a local momentum source term matching the pressure waves at cells near the boundary.

I'm not sure either is enough, and both options require additional thought (the first one is more "classical", and probably the safest bet), but this may help you get started.

And then again, I'm the code structure/parallelism/IO/mesh interfacing expert, with some all-around knowledge of the code and ists numerics, but the numerics experts might provide better answers...

Regards,

Yvan

[st268]

Hi Yvan,

Thanks for the reply, it was helpful to know that this probably isn't possible directly as it stops me looking!

I have been looking into the ALE module, and gone through the tutorial for the oscillating cylinder in the past but, whilst I could get it to run, I couldn't ever visualise the results correctly. The tutorial is for v2 and I think CS has changed quite a bit since then. I also found a couple of presentations on ALE for free surface use but they were from 2009 and dealt more with the theory than the application.

Do you, or anyone else, know of any more resources that exist for learning more about the ALE module?

Thanks again,

Susan