Hi,

I am trying to use DEFINE_UDS_FLUX to modify the user scalar equation. I got the following error message from fluent:

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: ()

My UDF is as follows,

#include "udf.h" #define DEN_L 2480.0 DEFINE_UDS_FLUX(my_uds_flux, f, t, i) {

real NV_VEC(psi_vec), NV_VEC(A);

NV_D(psi_vec, =, F_U(f,t), F_V(f,t), F_W(f,t));

NV_S(psi_vec, *=, DEN_L);

F_AREA(A, f, t);

return NV_DOT(psi_vec, A); }

I will be so grateful is anyone can tell me what is wrong with this UDF.

Thank you.

Bing Ma

The same error I encountered. I didn't solve it now, but in your case there need to define some variable,such as real A[ND_ND]; , you can have a try.

BR

Erica

Hi Erica,

Thank you for your reply. I found the answer now. It is because the face variables are not available inside the domain, they are only available at the domain boundaries.

Good luck for you.

Bing

I think you can use this: " F_FLUX(f,t) " .

[sunjian]

Hi, Bing. Could you tell me how you solved the problem? I met a similar problem. Thank you very much.