[macfly]

Hi,

I'm trying to set the density of aluminum via a very simple interpreted DEFINE_PROPERTY udf :

#include "udf.h"
DEFINE_PROPERTY(my_density, c, t)
{
real rho;
rho=1000;
return rho;
}

I don't understand why it doesn't work, after the solution is converged Fluent returns that the density of aluminum is the default value of 2719 kg/m³, see the pictures. What am I missing? (and yes, I click the Change/Create button before closing the Create/Edit Materials window)

[ghost82]

Maybe a bug?
Here is the same problem:
http://www.cfd-online.com/Forums/flu...d-density.html

However it seems fluent use the custom defined values for calculation.
Which fluent version do you have?

[macfly]

Yes, I saw that other thread.

I'm using 14.5.7

[macfly]

My udf works fine for setting the Specific Heat or Thermal Conductivity, it's just with the Density that it doesn't work.

[macfly]

Ok I retrieved the value of the solid density with C_R(c,t) within a DEFINE_EXECUTE_AT_END macro and I get the value I set in my udf. It looks as if it's just a postprocessing bug.