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Showing results 1 to 14 of 14 Search took 0.00 seconds. Search: Posts Made By: vicarious

Forum: Main CFD Forum November 28, 2012, 09:35

Replies: 37 inlet has higher pressure than outlet in axial flow fan Views: 4,538 Posted By vicarious Dear Aadhavan, I disagree with such statement... Dear Aadhavan, I disagree with such statement that "k-epsilon is inappropriate for simulating fans and compressors". Because there is not a certain way to decide which model could fit the problem....

Forum: Main CFD Forum November 28, 2012, 05:02

Replies: 37 inlet has higher pressure than outlet in axial flow fan Views: 4,538 Posted By vicarious Hi Aadhavan, Glad to see your simulation... Hi Aadhavan, Glad to see your simulation running. The experimental validation depends on several reasons and it's not easy to find what the problem might be. I have the same problem with pressure...

Forum: Main CFD Forum November 21, 2012, 04:34

Replies: 37 inlet has higher pressure than outlet in axial flow fan Views: 4,538 Posted By vicarious Do not use velocity inlet for this type of... Do not use velocity inlet for this type of devices. You need to set the inlet boundary as a fixed total pressure and total temperature. You can also set it as mass flow with inlet static pressure.

Forum: Main CFD Forum November 19, 2012, 13:06

Replies: 37 inlet has higher pressure than outlet in axial flow fan Views: 4,538 Posted By vicarious My pleasure, I hope you succeed dear Aadhavan. My pleasure, I hope you succeed dear Aadhavan.

Forum: Main CFD Forum November 19, 2012, 06:09

Replies: 37 inlet has higher pressure than outlet in axial flow fan Views: 4,538 Posted By vicarious Dear Aadhavan, I'm not familiar with the... Dear Aadhavan, I'm not familiar with the FAOM errors I'm afraid. Is your mesh fine enough? maybe it's something due to the mesh.

Forum: Main CFD Forum November 17, 2012, 23:01

Replies: 37 inlet has higher pressure than outlet in axial flow fan Views: 4,538 Posted By vicarious Hi Aadhavan, The constant total pressure I... Hi Aadhavan, The constant total pressure I mentioned was not for the whole domain as a fixed value (It's only valid for irrotational flows), I meant for the calculation the inlet total pressure will...

Forum: Main CFD Forum November 16, 2012, 14:31

Replies: 37 inlet has higher pressure than outlet in axial flow fan Views: 4,538 Posted By vicarious Pardon me but something is wrong with the file... Pardon me but something is wrong with the file you attached, showing something else.

Forum: Main CFD Forum November 15, 2012, 17:10

Replies: 37 inlet has higher pressure than outlet in axial flow fan Views: 4,538 Posted By vicarious If you are able to take the pressure difference... If you are able to take the pressure difference into account, then use it to set the outlet pressure as 200 Pa less than the inlet for example. No, you just can't sum these two values. I meant to...

Forum: Main CFD Forum November 15, 2012, 16:31

Replies: 37 inlet has higher pressure than outlet in axial flow fan Views: 4,538 Posted By vicarious Yes your inlet Ps is correct. But as I said,... Yes your inlet Ps is correct. But as I said, the outlet pressure condition is calculated based on the pressure rise that fan produces. I suppose axial fans do not increase the pressure too much,...

Forum: Main CFD Forum November 15, 2012, 15:56

Replies: 37 inlet has higher pressure than outlet in axial flow fan Views: 4,538 Posted By vicarious Yes you need to give them both so the solver will... Yes you need to give them both so the solver will be able the calculate the inlet velocity itself. The total pressure is fixed in the solution. The static pressure is used to guess the initial...

Forum: Main CFD Forum November 15, 2012, 15:27

Replies: 37 inlet has higher pressure than outlet in axial flow fan Views: 4,538 Posted By vicarious Yes the atmospheric pressure or the free stream... Yes the atmospheric pressure or the free stream pressure is the total pressure, which is 101325 Pa in your case. Regards.

Forum: Main CFD Forum November 15, 2012, 14:31

Replies: 37 inlet has higher pressure than outlet in axial flow fan Views: 4,538 Posted By vicarious Hi Aathavan, Yes I meant the inlet section... Hi Aathavan, Yes I meant the inlet section area. Since you've already calculated the inlet dynamic pressure, do the math from the same correlation (Ps=P0-Pd), and set it as your inlet total and...

Forum: Main CFD Forum November 15, 2012, 10:22

Replies: 37 inlet has higher pressure than outlet in axial flow fan Views: 4,538 Posted By vicarious By setting the inlet as mass flow rate, there is... By setting the inlet as mass flow rate, there is always a chance that the inlet pressure decreases. Is there any dimension of the experimental setup? If there is, you calculate the inlet velocity...

Forum: Main CFD Forum November 15, 2012, 06:07

Replies: 37 inlet has higher pressure than outlet in axial flow fan Views: 4,538 Posted By vicarious Hi, Calculate the corresponding inlet static... Hi, Calculate the corresponding inlet static pressure and set the inlet boundary as total and static pressure. In such devices the inlet boundary is fixed as pressure and the outlet boundary is a...

Showing results 1 to 14 of 14

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