[richard ben]

Hey, everyone,

I began to change my udf from interpet to compile, however meet some problem and have no idea how to do.

1. The diffusivity

the code:

DEFINE_DIFFUSIVITY(uds_diffusivity_2,c,t,i)
{
return s_lamda*(1.0-POR)/3.0;
}
when I load this code, the uds goes to divergence. However, when I change "s_lamda*(1.0-POR)/3.0" into a constant, it works fine. In fact, s_lamda*(1.0-POR)/3.0 is a constant in my code since I defined "s_lamda" and "POR" in the begining of the code. This is weird

2. The source term

the code:
DEFINE_SOURCE(fluid_source_1,c,t,dS,eqn)
{
real Re, P, alamda_f, h,source_f;
alamda_f=C_K_L(c,t);
Re=C_U(c,t)/POR*ds*C_R(c,t)/C_MU_L(c,t);
P=-8.278*pow(POR,0.38)+57.384*pow(POR,1.38)-106.63*pow(POR,2.38)+95.756*pow(POR,3.38)-37.24*pow(POR,4.38);
h=2.096*pow(POR,0.38)*alamda_f*pow(Re,0.438)*P/(ds*ds);
source_f=h*(C_UDSI(c,t,0)-C_T(c,t));
dS[eqn]=-h;
return source_f;
}

I can load this source without any problem when interpreting, however in compiling it doesn't work at all. And the error is:
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: #f

I have no idea what's wrong with my code or is there any difference between compile and interpret?

I will appreciate a lot for your help.