[B.Hamada]

hi
I work on the phase change of the PCM, so to model the solid-liquid change of PCM, I used the gauss distribution for the Cp, I used an UDF for this reason, my problem is that my UDF has no error, all is well, but when I run a calculation by Fluent, my results are not as I think, it means that Fluent has not worked by the UDF or there is another problem I do not know about it.
My UDF

PHP Code:

#include "udf.h" 
DEFINE_SPECIFIC_HEAT(my_user_cp, T, Tref, h, yi) 
{ 
real cp;  

if (T <= 299.6) 
{ 
cp = 1413+232000*exp(-0.5*(T-299.6)*(T-299.6)); 
} 
else
{ 
cp = 1797+232000*exp(-0.5*(T-299.6)*(T-299.6)); 
} 
*h = cp*(T-Tref); 
return cp; 
} 


Please help me. Thank's

[B.Hamada]

Pleaaaaaaaaaaaaaaaaaaaaaaaaaaaase help meeeeeeeeeeeeeeee

[pakk]

If you think Fluent does not use your UDF, try putting

Message("test");

somewhere in it.
If you see "test" appearing in your screen (many times), the UDF is used.

[B.Hamada]

Originally Posted by pakk

If you think Fluent does not use your UDF, try putting

Message("test");

somewhere in it.
If you see "test" appearing in your screen (many times), the UDF is used.

Thank you i will try it