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[Sponsors] |
October 12, 2013, 08:24 |
modified interPhasechangeFoam base Temp
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#1 |
Member
Mohammad Bahreini
Join Date: Dec 2012
Posts: 36
Rep Power: 13 |
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 it’s 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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October 12, 2013, 08:32 |
I try a simple case
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#2 |
Member
Mohammad Bahreini
Join Date: Dec 2012
Posts: 36
Rep Power: 13 |
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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October 17, 2013, 16:37 |
anybody can Help me??
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#3 |
Member
Mohammad Bahreini
Join Date: Dec 2012
Posts: 36
Rep Power: 13 |
anybody can Help me??
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