Forum: OpenFOAM
July 17, 2012, 12:46
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Replies: 63
Views: 24,118
Thanks a lot for your reply.
that makes...
Thanks a lot for your reply.
that makes sense, but I have a question. Do we solve the N.S equations at the boundary?!!
I guess we solve N.S equation for the first grid point and that is where...
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Forum: OpenFOAM
July 17, 2012, 11:17
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Replies: 63
Views: 24,118
Hi Anne,
you discussed about the wall...
Hi Anne,
you discussed about the wall shear stress at the wall which contains the modified nut at the wall and that affects the solution for momentum equation.
Can you please tell me how I can...
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Forum: OpenFOAM
July 11, 2012, 17:11
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Replies: 63
Views: 24,118
Hi Roman
I have a quesion about...
Hi Roman
I have a quesion about nutkwallFunction. When I checked a solution using k-epsilon wall function and nutkWallfunction, I noticed that the values for nut at the first grid point is...
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Forum: OpenFOAM
May 22, 2012, 11:45
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Replies: 63
Views: 24,118
Anne,
I have another quick question. How...
Anne,
I have another quick question. How can I get the values at the boundary. when I go to paraview, I can export my data at the cell centers, but that data do not include values at the...
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Forum: OpenFOAM
May 22, 2012, 11:41
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Replies: 63
Views: 24,118
hi Anne,
thanks for your reply. you are...
hi Anne,
thanks for your reply. you are correct. But, then for the calculation of nut in nutkwallfunction, i see that we need the value of K at the first grid point. I do not understand what value...
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Forum: OpenFOAM
May 17, 2012, 14:41
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Replies: 63
Views: 24,118
kqRWallFunction
Hi,
I have a quick question. Do you know what kqRWallFunction is doing in OpenFoam?! It seems that this wall function imposes zero gradient boundary condition for the first grid point turbulent...
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Forum: OpenFOAM
May 3, 2012, 14:03
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Replies: 63
Views: 24,118
Thanks Anne
I have also looked through all...
Thanks Anne
I have also looked through all subroutines and I could not find a place to impose wall behavior for U and I guessed that OpenFoam solves the momentum equation to obtain U at the...
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Forum: OpenFOAM
April 29, 2012, 16:39
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Replies: 63
Views: 24,118
Hi
I am now aware of how nut, epsilon and...
Hi
I am now aware of how nut, epsilon and production are modified for the first grid point when using nutkWallFunction in k-epsilon model. But, I also need to know where in the codes, U is...
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Forum: OpenFOAM
January 17, 2012, 16:41
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Replies: 63
Views: 24,118
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Forum: OpenFOAM
January 6, 2012, 14:36
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Replies: 63
Views: 24,118
Thanks guys,
I do not have any exprience in...
Thanks guys,
I do not have any exprience in making a new library, but I will try to do that. Meanwhile, I have another serious problem with my lid driven cavity Problem. I am using Ras and...
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Forum: OpenFOAM
January 3, 2012, 18:06
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Replies: 63
Views: 24,118
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Forum: OpenFOAM
December 20, 2011, 16:23
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Replies: 63
Views: 24,118
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Forum: OpenFOAM
December 15, 2011, 12:36
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Replies: 63
Views: 24,118
Hey guys,
Another thing is that even for...
Hey guys,
Another thing is that even for the cavity simulation in Open Foam Tutorial, I see that yPlus for fixed walls is always less than 11. Do you have any idea how important it is to obtain...
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Forum: OpenFOAM
December 15, 2011, 11:20
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Replies: 63
Views: 24,118
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Forum: OpenFOAM
November 30, 2011, 14:31
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Replies: 63
Views: 24,118
Thanks for your answer. It was so helpful.
To...
Thanks for your answer. It was so helpful.
To me, it seems that using this kind of wall function is strongly dependent on mesh selection. I guess we should select a mesh for which we can apply log...
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Forum: OpenFOAM
November 25, 2011, 22:26
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Replies: 63
Views: 24,118
nutkwallfunction
Hello everyone :)
I have recently started working with OpenFoam. I am now solving cavity problem in 3D. for turbulence model, I selected RANS and k-epsilon. for wall function, I selected...
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