Density for calculating Force Coefficients
 

I am plotting force and moment coefficients on an aerofoil in a transient simulation, as user points in CFX-solve. Currently these are based on expressions I have inputted into CFX-pre, eg

Fx=force_x()@aerofoil=> gives the force on the surface

CFx=Fx/(0.5*Rho*U*S) => gives the force coefficient With these I specify the density value for Rho beforehand in CFX-Pre. However, is there any way I can assign the value for Rho as the flow density say over the inlet boundary, rather than as a value I specify?

Thanks in advance

Re: Density for calculating Force Coefficients
 

Hi,

I'm not sure this is what you want, but you can create an expression for Rho: Rho = areaAve(Density)@inlet.

Re: Density for calculating Force Coefficients
 

Thanks Rui, thats just what I'm after