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Old   June 11, 2007, 06:39
Default Hi all, I need to know if a
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Hi all,

I need to know if anybody has already implemented a simple Stockes equation? (without the non-linear term)



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Old   June 11, 2007, 16:34
Default Check out potentialFoam. An
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Srinath Madhavan (a.k.a pUl|)
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Check out potentialFoam.

Another related discussion thread: http://www.cfd-online.com/OpenFOAM_D...es/1/2765.html
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Old   June 11, 2007, 16:45
Default My Apologies. potentialFoam is
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My Apologies. potentialFoam is the opposite of what you want. Check that other thread instead.
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Old   June 12, 2007, 03:22
Default Hi pUIl, Thank you to reply
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Hi pUIl,

Thank you to reply me.

Indeed, I think taht I found how to have a simple Stockes:

I removed "div(phi,U)" term in the simpleFoam.

Of course, I made it after studying precisely the code with DoxyGen.
I'm quite sure that I have my STOCKES solver, now.

Hope that somebody does tell me if I'm wrong.

Cheers,

Lam
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Old   June 12, 2007, 03:28
Default Do a quick validation. Stokesi
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Srinath Madhavan (a.k.a pUl|)
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Do a quick validation. Stokesian flow past a fixed sphere. There are analytical expressions you can compare your numerical results with.
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Old   June 12, 2007, 05:42
Default Hi pUII, Thnaks to give thi
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Hi pUII,

Thnaks to give this information.
I've tried to find the ananlytical expression but I've not found it.
Can you tell in which paper I can find it?

THanks in advance pUII,

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Old   June 12, 2007, 05:50
Default Compare your velocity/pressure
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Compare your velocity/pressure fields with any of the analytical expressions[1,2]. Alternately, you could try using the liftDrag utility to estimate the net drag force on the sphere and compare it with the usual expression:

Fd = 6 * pi * dynamic viscosity * radius * free_stream_velocity

[1] http://scienceworld.wolfram.com/phys...lowSphere.html

[2] http://web.mit.edu/fluids-modules/ww.../2-5Stokes.pdf
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Old   June 12, 2007, 08:38
Default Ok, pUII! I think this the
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Ok, pUII!

I think this the right way to check.

Thanks again.

My best cheers,

Lam
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