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January 13, 2013, 07:34 |
k-epsilon and pisoFoam
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#1 |
Senior Member
zaynah K.
Join Date: Jun 2012
Location: Mauritius
Posts: 138
Rep Power: 13 |
hi..
i have a case where i have sent a 2m/s velocity and observe the trail around a cube. I have successfully done it in Fluent. i had as boundary condition the inlet velocity, the outflow and the symmetry for my domain then the wall for the cube. i was in turbulent regime and using K-epsilon model with Simple algorithm. Now i wish to apply it to Openfoam. so i chose pisoFoam and Ras model I have changed my U and P Boundary cond accordingly.. My problem is i do not know how to modify the K-epsilon and fv solution and fv scheme accordingly.. Any idea from the experienced user on how to modify the above mentioned specifications?? Regards zaynah |
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January 13, 2013, 16:12 |
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#2 |
Member
Join Date: Jun 2012
Posts: 76
Rep Power: 13 |
As a starting point, have a look at one of the tutorial cases.
You should use wall functions for k (kqRWallFunction), epsilon (epsilonWallFunction) and nut (nutUWallFunction) at the walls. At the inlet you can use the following two boundary conditions to estimate k and epsilon based on the turbulent intensity and the length scale: turbulentMixingLengthDissipationRateInlet for epsilon turbulentIntensityKineticEnergyInlet for k |
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January 13, 2013, 23:13 |
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#3 | ||
Senior Member
zaynah K.
Join Date: Jun 2012
Location: Mauritius
Posts: 138
Rep Power: 13 |
hi thanks for your reply.
here is my modified files but i found this error.. Quote:
Quote:
Last edited by zaynah04; January 14, 2013 at 10:34. |
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January 17, 2013, 07:23 |
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#4 |
Member
Gregor Olenik
Join Date: Jun 2009
Location: http://greole.github.io/
Posts: 89
Rep Power: 16 |
Hi zaynah,you have a missing curly bracket at the defintion of p
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January 20, 2013, 03:26 |
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#5 |
Senior Member
zaynah K.
Join Date: Jun 2012
Location: Mauritius
Posts: 138
Rep Power: 13 |
hi Gregor..
in fact you are right and also i had done a mistake on the K file in Boundary condition.. it now work beautifully.. thanks |
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