CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLUENT (http://www.cfd-online.com/Forums/fluent/)
-   -   Pressure Inlet Conditions (http://www.cfd-online.com/Forums/fluent/32202-pressure-inlet-conditions.html)

Sangeon September 25, 2003 02:55

Pressure Inlet Conditions
 
If I know the total pressure in inlet and this flow is supersonic, as they say, I need to specify the static pressure.

1) Why?

2) How can I get this static pressure? Just using isentropic relation and the given total pressure with Mach = 1?

Chetan Kadakia September 25, 2003 04:18

Re: Pressure Inlet Conditions
 
You have to specify the static pressure in order to signify how much of the total pressure is dynamic pressure. You can estimate the dynamic pressure from the velocity, and then subtract the dynamic pressure from the total pressure and you have static pressure.

Po = Ps + Pd Po: Total Pressure Ps: Static Pressure Pd: Dynamic Pressure

Pd = 1/2(ro)V^2 ro: density V: velocity

Klarke_zhu September 26, 2003 05:42

Re: Pressure Inlet Conditions
 
you can cancle the operation pressure,then input Gauge total pressure and the static pressure.Normally the static pressure can be set equal to the outpressre.You can see an example in the help files.


All times are GMT -4. The time now is 03:22.