CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLUENT (http://www.cfd-online.com/Forums/fluent/)
-   -   On the far field boundary conditions. (http://www.cfd-online.com/Forums/fluent/35419-far-field-boundary-conditions.html)

mini January 10, 2005 03:13

On the far field boundary conditions.
 
During the simulation, I need to use the far field boundary conditions, i.e. free boundary conditions for the incompressible ideal gas, but in the Fluent, the pressure far field boundary conditions is only for the compressible ideal gas, so, I doní»t know what I should do. Help, please. Thanks.

Luca January 10, 2005 05:01

Re: On the far field boundary conditions.
 
What kind of simulation are you doing?an aircraft or car analysis?

mini January 10, 2005 06:13

Re: On the far field boundary conditions.
 
Far field of the jet, what should I do? thanks

Luca January 10, 2005 06:16

Re: On the far field boundary conditions.
 
Use the pressure-outlet BC.

mini January 10, 2005 08:23

Re: On the far field boundary conditions.
 
How can I set the pressure value?

someone January 11, 2005 13:39

Re: On the far field boundary conditions.
 
you're gonna get some reverse flow. so place the pressure outlets as far as you can.

RIaan January 11, 2005 17:11

Re: On the far field boundary conditions.
 
Use Pressure Far-field and set your gas to Ideal gas regardless.

If you suspect your flow mach number is low enough to avoid compressibility effects (Ma <0.3), you should still get the same solution even though you use the ideal gas/Pressure far field.


mini January 11, 2005 21:53

Re: On the far field boundary conditions.
 
I see. Thank you for you help.


All times are GMT -4. The time now is 18:15.