hello, everyone, my UDF is as follow:

include "udf.h" DEFINE_PROPERTY(cell_diffusion_coefficent,c,t) { real ud; real rho=C_R(c,t); real mu=C_MU_EFF(c,t); ud=mu/rho; return ud; }

when i interpreted it in fluent 6.1.22,the folowing error messages are given:

DUDFCONFIG_H="<udfconfig.h>" E:\user CFD\diffusion coefficient. cError: E:\user CFD\diffusion coefficient.c: line 1: parse error.

thanks in advance for any help!

You made very simple mistake you did not put # sign before your include "udf.h".

it should be like this #include "udf.h"

Y

may be your ###.c file is not in the same location as is your cas file. or your ###.c file should be in the same folder where you read your .msh file.(if you just opened your.msh file)

thanks for help! I'm sorry for missing the "#" in the forum, but there is "#" in my UDF when I interpreted it to FLUENT. My ***.c file and my case file are under the same directory. There's no mesh file under the directory. I'll try to put them in the same folder and intertpret it again.

Hey the program should run since its working for me. Y

Dear Y, I want to know if this program can be interpreted successfully in your fluent case. Thanks for responsing!

I have done this problem. Thanks for each responsing!