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June 27, 2006, 22:04 |
Hello Friends
I was wonderi
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#1 |
Senior Member
kumar
Join Date: Mar 2009
Posts: 112
Rep Power: 17 |
Hello Friends
I was wondering if there is a mistake in the PISO loop for the interFoam , rasInterFoam solvers. In Dr. Rusche's PHD page 148, (Del.V) = 0 , but at the interface density is rapidly changing so shouln't (Del.(rho*V)= 0); Looking at the PISO loop in rasInterFoam we have laplacian(rUAf,pd)==div(phi) . should this be changed to something like laplacian(rUAF*rho,pd) == div(phi*rho) Thanks a lot in advance Kumar |
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June 28, 2006, 13:57 |
Dear Friends
Could someone
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#2 |
Senior Member
kumar
Join Date: Mar 2009
Posts: 112
Rep Power: 17 |
Dear Friends
Could someone comment on this post ? thanks kumar |
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June 28, 2006, 14:09 |
No, because the interFoam solv
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#3 |
Senior Member
Eugene de Villiers
Join Date: Mar 2009
Posts: 725
Rep Power: 21 |
No, because the interFoam solver conserves volume not mass (both fluid are assumed incompressible). This is done specifically to get around the problem of large gradients at the interface.
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June 30, 2006, 19:26 |
Hi Eugene
Thanks a lot for
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#4 |
Senior Member
kumar
Join Date: Mar 2009
Posts: 112
Rep Power: 17 |
Hi Eugene
Thanks a lot for your reply. I have just one more question. In equation of 4.28 of henrik rusche's phd thesis we have phi=phi* - (1/A_D)_face * |S|*faceGradient(P) But in 4.30 we have something like div( (1/A_D)_face , gradient(P) ] = diver.(phi*) How is |S|*faceGradient(P) converted to gradient(P) ?? In all openfoam solvers the equation 4.30 is implemented and they are dimensionally correct. Another question if rUA = 1.0/UEqn.A() is rUAf = rUA interpolated on the face and multiplied with surface area or it is just rUA interpolated to the faces Thanks a lot once again Kumar |
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