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modified interPhasechangeFoam base Temp

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Old   October 12, 2013, 08:24
Default modified interPhasechangeFoam base Temp
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Mohammad Bahreini
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Hello foamers

I have managed to implement the interPhaseChangeFoam solver according to the project done by Martin Andersen [http://www.google.com/url?sa=t&rct=j...3899372,d.cGE]. I have also modified the solver to take the account of variable diffusion coefficient [DT ] based on the volume fraction of both phases. I have successfully compiled the solver and managed to get reasonable results on tutorial case. However, when I try to use this solver on my own case, I get completely wrong results. [A 2D case(pipe) that in bottom temperature 5 k more than saturation temperature and All of the wall velocity and pressure is zero gradient ]. After just a few time steps, temperature goes very high (higher than 200000 k) in just a few cells at the corner of the geometry, as I think itís the problem of singularity. Meanwhile, water phase evaporates quickly in a very short period of time. I have tried different mesh size and boundary condition and the problem is still there. I have attached the solver and my test case here, so you guys can kindly help me get through this issue.

Regards and thank you in advance
link upload:
http://www.uplooder.net/cgi-bin/dl.c...963f28b866e1c5

http://www.uplooder.net/cgi-bin/dl.c...03cc17ab200e16
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Old   October 12, 2013, 08:32
Default I try a simple case
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Mohammad Bahreini
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Hi Foarmers
I try my solver in simple test.(Stephan Problem) but I see the water phase evaporates quickly in a very short period of time (low 0.005 s). I dont know what happen..I think dont understand Property this Solver(interPhasechangeFoam) and I cant use this solver for this cases.
stephan Problem:
http://www.uplooder.net/cgi-bin/dl.c...b7e5e7c33e013e
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Old   October 17, 2013, 16:37
Default anybody can Help me??
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Mohammad Bahreini
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anybody can Help me??
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