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Implementing a UDS for anisotropic diffusivity in FLUENT

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Old   January 31, 2019, 06:29
Default Implementing a UDS for anisotropic diffusivity in FLUENT
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Jasper Meeusen
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I am trying to implement the following UDF in my model in FLUENT. ( I have very limited knowledge of UDF coding).

#include "udf.h"
DEFINE_ANISOTROPIC_DIFFUSIVITY (gamma_DalyHarlow, c, t, i, dmatrix)
real Cth = 0.3;
real k = C_K(c,t); real eps = C_D(c,t);
real LAMBDA= C_K_L(c,t);
real CP = C_CP(c,t);
real RHO = C_R(c,t);

dmatrix[0][0] = LAMBDA/CP+RHO*Cth*k/eps*C_RUU(c,t);
dmatrix[1][1] = LAMBDA/CP+RHO*Cth*k/eps*C_RVV(c,t);
dmatrix[0][1] = RHO*Cth*k/eps*C_RUV(c,t);
dmatrix[1][0] = dmatrix[0][1];

After implementation, according to the ANSYS UDF manual for the ANISOTROPIC_DIFFUSIVITY macro, ( interpreting this UDF - introducing a UDS - load UDS as new additional material property) an error appears.

Using ANSYS FLUENT 18.2, the error is as follows:

"node 0 process 24008: Received Signal SIGSEGV -

MPI application rank 0 exited before MPI_Finalize() with status 2 "

I tried running the model in serial mode instead of parallel, however, the error remained.

Does anybody have a suggestion? Thanks a million!
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anistropic, udf, uds

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