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-   -   Mass flow = 0 on opening (http://www.cfd-online.com/Forums/cfx/19097-mass-flow-0-opening.html)

Jens July 30, 2002 15:42

Mass flow = 0 on opening
 
Hi,

I have a model with large number of inlets, outlets and few openings. Unfortunably, the database file for this problem is not working anymore due to disk error.

I would like to try to close 3 openings in the model.

It is possible to specify an opening with Zero Mass Flow rate ???

How will this influnce on the model,- does it work as a wall or ???

Thanks a lot in advance.

Regards

Jens

Tommaso July 31, 2002 07:14

Re: Mass flow = 0 on opening
 
Hi Jens, yes , it's possible to specify an opening with zero mass flow rate defining it as MASS FLOW BOUNDARY and setting in command file or in USRBCS the zero flow condition.I have found a better convergence using the fortran subroutine.This type of patch works as a closed sect rather than a wall.

Regards

Tommaso

Jan Rusås August 2, 2002 18:13

Re: Mass flow = 0 on opening
 
If you just want the old openings to be walls, you can just remove them in the geometry file. Remember to adjust the number of patches.


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