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-   -   drag coefficient computation on a porous jump??? (https://www.cfd-online.com/Forums/fluent/41758-drag-coefficient-computation-porous-jump.html)

Fabrice July 17, 2006 22:13

drag coefficient computation on a porous jump???
 
Hi everybody,

In my study case I've got a porous jump to model a perforated plate and I would like to compute the drag coefficient on it. The problem is that Fluent only calculates the drag coefficient on boundaries declared as a wall (not as a porous jumb). Any idea to solve this problem???

Many thanks,

Fab.


Vincent July 18, 2006 04:10

Re: drag coefficient computation on a porous jump?
 
You can calculate the total force on the porous jump by integrating the pressure difference over the surface. The best way to do this is by using custom field funcions. Use the reference values to convert the force to a coefficient.

Fabrice July 18, 2006 08:27

Re: drag coefficient computation on a porous jump?
 
Hi Vincent,

OK for the method, Thank you very much for your advice.

Cheers,

Fabrice.

wxn June 5, 2017 04:39

Hi,
may I ask a question ? How to integrat the pressure difference over the porous jump by using custom field funcions?

KaLium June 5, 2017 05:30

Don't overthink this problem.

You can monitor pressure on both sides of the porous jump. Then you can calculate the pressure difference yourself.


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