When ever i interpret a udf and then initialise Fluent gives this error 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. Error Object: ()

Can any one help me. Thanks in advance.

What functions do you have in your UDF? If you use UDS and UDM be sure that you enabled them.

Bogdan, I use them and i have enabled them also

I never use the interpret option for my UDF, I always use the compile option, so I suggest to compile the UDF and try again. If you still get the segmentation fault, maybe it's better to post you DEFINE_INIT function to have a look.

Bogdan, I have used DEFINE_INIT macro also. But while iniatilising the solution it again gives the same error.

Hi Sangeeta, You can send your UDF here and have a look. Then may be we can give you the solution...

Suvash

here is my udf Suvash,

# include "udf.h" enum { Ar, Ai, N_REQUIRED_UDS };

double mu0 = 12.56e-7; double omega = 18.84e6; double x[0];

DEFINE_PROPERTY(cell_conductivity,c,t) {

double cond = 3.078e-23;

begin_c_loop (c,t)

{

real temp = C_T(c,t);

if (temp < 8000.)

cond = 2.26e6* exp(-6.21e4/temp);

else if ( temp > 8000. && temp < 15000. )

cond = 1.96e5* exp ( -4.26e4/temp);

else

printf ("The temperature is higher than15000");

C_UDMI(c,t,0) = cond;

}

end_c_loop (c,t) }

DEFINE_INIT(inlet_Atheta,d) {

cell_t c;

Thread *t;

Domain *d;

thread_loop_c(c,d)

{

C_UDSI_G(c,t,0)[1]=0.;

C_UDSI_G(c,t,1)[1]=0.;

}

}

DEFINE_SOURCE(Ar_source,c,t,ds,eqn) {

real x[ND_ND];

C_CENTROID(x,c,t);

ds[eqn] = mu0*omega*C_UDMI(c,t,0);

return -C_UDSI(c,t,0)/(x[0]*x[0])+mu0*C_UDMI(c,t,0)*omega*C_UDSI(c,t,1); }

DEFINE_SOURCE(Ai_source,c,t,ds,eqn) {

real x[ND_ND];

C_CENTROID(x,c,t);

ds[eqn] = -mu0*omega*C_UDMI(c,t,0);

return -C_UDSI(c,t,1)/(x[0]*x[0])-mu0*C_UDMI(c,t,0)*omega*C_UDSI(c,t,0); }

DEFINE_DIFFUSIVITY(Atheta_diffusivity,c,t,i) {

double x = 1;

return x; }