[daire6]

Hi,

I am relatively new to computational fluid dynamics, so i need your help

I am trying to simulate radiation heat transfer in a radial inflow turbine. Instead of modelling thermal radiation between fluid and turbine blades, I need to simplify the problem by adding a point heat source inside of the flow domain so that the heat source generated by this point would be mathematically equivalent to the radiation occurs from the fluid flowing through the blades.

I thought of implementing a simple UDF code like this :

 

#include "udf.h"

DEFINE_SOURCE(sourceterm,c,t,dS,eqn)

{

real x[ND_ND];
real source;

C_CENTROID(x,c,t);

if(x[0]==0.06 && x[1]==0.043 && x[2]==0.02)  /* coordinate point of the heat source */
{
source= 100;                                
ds[eqn]=0;
}
else
{
source=0;
ds[eqn]=0;
}
return source;
}

Since the mathematical model does not still exist, I put a constant value for the source term in my code for now. However, my problem is different.
Even though I successfully interpreted my file in the Fluent, I am not able to see the relevant UDF file when I would like to add a boundary condition from the fluid zone.

Is there a logical mistake in my if-else statement ?
Why can't I see the UDF file in the source term panel ?
Any simpler method that I can use for adding a point source term ?

Any help and advice would be appreciated.
Davut