[dj1210]

Hello.
I want to simulate bioheat transfer in skin. I have to add a property called blood perfusion rate, which is dependent from cell temperature.

I made a UDF, it was compiled and interpreted in Ansys Fluent 14.5 as well as in Ansys Fluent 17.2 Academic. But everything crashes (error: received a fatal signal (Segmentation fault)) when I try to execute macro DEFINE_ON_DEMAND, the simplest part of my UDF.
Here is my macro:
#include "udf.h"

DEFINE_ON_DEMAND (zeruj_pamiec_demand)
{
Domain *d;
cell_t c;
Thread *t;

thread_loop_c(t,d)
{
begin_c_loop(c,t)
{
C_UDMI(c,t,0) = 0.0;
C_UDMI(c,t,1) = 0.0;
C_UDMI(c,t,2) = 0.0;
}
end_c_loop(c,t)
}
}

I've read something about solutions of this error and I tried some of them:
1) I hope I run the macro in proper way: I run Fluent, Define->Memory, Define->UDF, Initialize, Execute on Demand;
2) I tried small changes in UDF: 0 instead of 0.0, changing name, including "mem.h";
3) I tried to compile UDF instead of interpreting - running Fluent using CMD Shell (not sure if I did it right, it's kind of magic for me);
4) I tried running my case on my friend's computer.

After all nothing changes. Always the same error about segmentation fault.
What am I doing wrong? Any suggestions?

Hopefully waiting for somebody replying. Thank you in advance.

[`e`]

Have you allocated three user-defined memory locations? You're using the first three in this UDF.

[dj1210]

Yes, I use three memory locations and I define it every time before defining UDF.

[`e`]

You need to initialise the domain pointer with:

d = Get_Domain(1);

[dj1210]

Thank you very much, it's working. Have a nice day!