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Forum: FLUENT October 19, 2011, 02:57
Replies: 19
Views: 8,718
Posted By Naseem
I used these setting but not that much...

I used these setting but not that much improvement I have got. Was your case similar to the current case?
Forum: FLUENT October 19, 2011, 02:55
Replies: 19
Views: 8,718
Posted By Naseem
Thanks for the advice. Would you please briefly...

Thanks for the advice. Would you please briefly explain the case you were working on? Did you use a mix of pressure inlet and outlet BCs? Have you validated it against experimental data? Thanks
Forum: FLUENT October 17, 2011, 14:25
Replies: 19
Views: 8,718
Posted By Naseem
It looks that for such a small ambient region,...

It looks that for such a small ambient region, the pressure inlet/outlet BCs are the best options. However, I have increased the size of the ambient region and it appears that the case works better...
Forum: FLUENT October 17, 2011, 14:13
Replies: 19
Views: 8,718
Posted By Naseem
I have not built the model yet. It is meant to be...

I have not built the model yet. It is meant to be for a 2D PEM fuel cell. I have started off with this simple case just to have a feeling of how natural convection is treated in Fluent.
Forum: FLUENT October 17, 2011, 14:11
Replies: 19
Views: 8,718
Posted By Naseem
I used what you suggested. From velocity and...

I used what you suggested. From velocity and temperture contorus, it seems that the model does not work as good as that with Boussinseq model. I have a word file that contains some contours that have...
Forum: FLUENT October 15, 2011, 15:17
Replies: 19
Views: 8,718
Posted By Naseem
I did use the symmetry boundary condition but I...

I did use the symmetry boundary condition but I did not get a converged solution. As for the constant temperature boundary condition, should I use a wall BC with a specified temperature?
Forum: FLUENT October 15, 2011, 15:02
Replies: 19
Views: 8,718
Posted By Naseem
Thanks LuckyTran for the reply and the advice. I...

Thanks LuckyTran for the reply and the advice. I used pressure outlets for the boundaries and it sounds that the solution is realistic. What I made this different this time is that I have used...
Forum: FLUENT October 14, 2011, 03:10
Replies: 19
Views: 8,718
Posted By Naseem
Very simple natural convection problem

Hi guys,

I am trying to model natural convection in air-breathing PEM fuel cells. In order to better understand the physics of the problem, I have tried to simulate a very simple case: a vertical...
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