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Forum: FLUENT May 31, 2013, 09:48
Replies: 39
Views: 13,324
Posted By tobiley
That's why I wanted to model only one hole :) but...

That's why I wanted to model only one hole :) but your point about the walls is understandable and yes I tried to minimise their influence by symmetry etc. but indeed these boundary conditions will...
Forum: FLUENT May 30, 2013, 05:43
Replies: 39
Views: 13,324
Posted By tobiley
Hi OJ, Thanks for your reply. Sorry for...

Hi OJ,

Thanks for your reply.
Sorry for my poor explanation, I attached three other pictures. Hopefully they make it a clearer.

What I meant regarding the coefficients is that if I do not...
Forum: FLUENT May 29, 2013, 11:49
Replies: 39
Views: 13,324
Posted By tobiley
I just made a simple model with one hole and...

I just made a simple model with one hole and periodic conditions, which has some open area ratio. Then I compared what is the difference if I have a pure normal flow through that hole and if I have a...
Forum: FLUENT May 28, 2013, 08:57
Replies: 39
Views: 13,324
Posted By tobiley
Thanks for your reply OJ! Do you maybe...

Thanks for your reply OJ!

Do you maybe remember the papers saying that you can use the Idelchik Correlations up to 20-30°? I made similar experiences if I compare the results of a simple...
Forum: FLUENT May 28, 2013, 02:52
Replies: 39
Views: 13,324
Posted By tobiley
Hi, The porous jump model is only a 1D...

Hi,

The porous jump model is only a 1D simplification of porous media, are you guys sure that you can use it to solve a 3D problem? I always thought that you can only use it if you have a...
Forum: FLUENT April 30, 2013, 03:02
Replies: 39
Views: 13,324
Posted By tobiley
OJ thanks for your quick reply! To convert...

OJ thanks for your quick reply!

To convert to a 100% open area coefficient the fluent manual provides this formula Kl'=Kl*v(25%open)/v(100%open)

Idelchiks correlations are base on...
Forum: FLUENT April 29, 2013, 11:12
Replies: 39
Views: 13,324
Posted By tobiley
Yes I found that example but the Idelchik values...

Yes I found that example but the Idelchik values are also based on the flow of an 100% open area so just need to divide them by the thickness.

I will give it a try with large values for the...
Forum: FLUENT April 29, 2013, 09:47
Replies: 39
Views: 13,324
Posted By tobiley
Regarding the time and effort I totally agree you...

Regarding the time and effort I totally agree you OJ, that's why I would like to avoid modelling the plate and creating the mesh.

As far as I understand it the porous jump model can only be used...
Forum: FLUENT April 29, 2013, 09:04
Replies: 39
Views: 13,324
Posted By tobiley
Thank you for your replies. I acutually...

Thank you for your replies.

I acutually would like to avoide that because my plate will contain somehting like 20000-30000 holes, which would create a lot of work, especially if I want to compare...
Forum: FLUENT April 29, 2013, 03:05
Replies: 39
Views: 13,324
Posted By tobiley
Hello, I have the same problem as Elena. I...

Hello,

I have the same problem as Elena. I have a perforated plate but not a normal flow through the plate it is rahter a tangentil/parallel flow. Does anybody have a guidelinbe on this topic for...
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