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0906536m January 10, 2014 06:21

Error on initialisation simulation after implemening UDF
 
Hello there,
I have been trying to implement the Density and speed of sound UDFs for compressible liquid flows into my model. I use the example given within the UDF manual with my specific values:

/************************************************** ******************
Density and speed of sound UDFs for compressible liquid flows.
For use with pressure-based solver, for single phase, multiphase mixture
or cavitation models only.
Note that for density function, dp is the difference between a cell
absolute pressure and reference pressure.
************************************************** *******************/
#include "udf.h"

#define BMODULUS 24.32e9
#define rho_ref 2170
#define p_ref 101325

DEFINE_PROPERTY(brinesuperfluid_density, c, t)
{
real rho;
real p, dp;
real p_operating;

p_operating = 8.04e6;

p = C_P(c,t) + p_operating;
dp = p-p_ref;
rho = rho_ref/(1.0-dp/BMODULUS);
return rho;
}

DEFINE_PROPERTY(brinesound_speed, c,t)

{
real a;
real p, dp,p_operating;

p_operating = 8.04e6;

p = C_P(c,t) + p_operating;
dp = p-p_ref;
a = (1.-dp/BMODULUS)*sqrt(BMODULUS/rho_ref);

However, on initialising I get the error:

FLUENT received fatal signal (ACCESS_VIOLATION)
1. Note exact events leading to error.
2. Save case/data under new name.
3. Exit program and restart to continue.
4. Report error to your distributor.

What is wrong in the UDF? Any help would be appreciated!
:)


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