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Interior Fan BC convergence

Posted 4 févr. 2025, 20:03 UTC+1 Computational Fluid Dynamics (CFD) Version 6.2 1 Reply

Rodrigo Pires
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Hello there,

I'm working on a thermal analysis of an enclosured electric equipment that has 4 fans on it. I was testing the set up for the simulation on a simpler case. Just a 2D circular tube with a interior fan bc for inducing flow at a specific volumetric flux, but I can't make it converge.

Can anyone help me with that?

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1 Reply Last Post 5 févr. 2025, 23:18 UTC+1
Jeff Hiller COMSOL Employee

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Posted: 6 months ago 5 févr. 2025, 23:18 UTC+1

Hello Rodrigo,

I am not very well versed in the interior fan boundary condition but it seems to me that this may be a case of

1/ your flow rate being too high for the solution to be laminar as you specified it 2/ your not having set a reference pressure anywhere

When I made those changes to your file, I got convergence, see the attached file.

Best,

Jeff

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Jeff Hiller
Hello Rodrigo, I am not very well versed in the interior fan boundary condition but it seems to me that this may be a case of 1/ your flow rate being too high for the solution to be laminar as you specified it 2/ your not having set a reference pressure anywhere When I made those changes to your file, I got convergence, see the attached file. Best, Jeff

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