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Interior fan in CFD laminar model

Posted 12 nov 2014, 12:47 GMT-5 Fluid & Heat, Heat Transfer & Phase Change, Computational Fluid Dynamics (CFD), Materials Version 5.2 4 Replies

Iker Rodriguez
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Hi,

I would like to know how should I use the "Interior Fan" node, because my CFD models are unable to converge whenever I use this node. I've seen the usage of the "Fan" node in the PSU example model, but this node is seems different. Is there any other way to model a forced air movement inside a model?

Best regards,
Iker.
4 Replies Last Post 2 mag 2017, 10:35 GMT-4
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Alexandre Mangot
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Posted: 8 years ago 9 gen 2017, 13:35 GMT-5
Hi,

I have the same issue and am interested in knowing how to make the interior fan BC work. In my case it would be to model a turbulent flow.
Hi, I have the same issue and am interested in knowing how to make the interior fan BC work. In my case it would be to model a turbulent flow.
Reza Ansari Shirvan
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Posted: 8 years ago 11 apr 2017, 11:48 GMT-4
Hi,

Having an interior fan in the modeling of Laminar/turbulent flow should be straight forward. You should define it on a line in 2D domains and on a plate in 3D domains.
Remember the line and the plate should be interior boundaries. It should work by using interior fan default settings. If it doesn't work, upload your case here, then we can check it.

Best regards,
Reza
Hi, Having an interior fan in the modeling of Laminar/turbulent flow should be straight forward. You should define it on a line in 2D domains and on a plate in 3D domains. Remember the line and the plate should be interior boundaries. It should work by using interior fan default settings. If it doesn't work, upload your case here, then we can check it. Best regards, Reza
David Vieyra
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Posted: 8 years ago 2 mag 2017, 10:18 GMT-4
Dear Reza

I am having the same issue with the interior fan boundary condition. My model is 2D insulated box with a hot element inside. It is a problem of natural convection and I need to put a fan inside to recircle the internal air, the objective is to optimize the time of heating for the air. I have attached the file, please your support and help to get it on. I have try for different flow and pressure values for the fan but it fails for initialize. I can not ramp the fan values, cause the time of the heat transfer is one of my needs. I have also tried refining the mesh on the fan side.


Thank you & Regards.


David.
Dear Reza I am having the same issue with the interior fan boundary condition. My model is 2D insulated box with a hot element inside. It is a problem of natural convection and I need to put a fan inside to recircle the internal air, the objective is to optimize the time of heating for the air. I have attached the file, please your support and help to get it on. I have try for different flow and pressure values for the fan but it fails for initialize. I can not ramp the fan values, cause the time of the heat transfer is one of my needs. I have also tried refining the mesh on the fan side. Thank you & Regards. David.

Attachments:

David Vieyra
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Posted: 8 years ago 2 mag 2017, 10:35 GMT-4
I also would like to add. That the model must be at high pressure as an initial condition ( 4 bar - 8 bar) . May be that is the reason why the fan conflicts to initialize.


Thank you.



David.
I also would like to add. That the model must be at high pressure as an initial condition ( 4 bar - 8 bar) . May be that is the reason why the fan conflicts to initialize. Thank you. David.

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