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2D Static Gaussian heat flux udf

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Old   January 16, 2022, 11:12
Default 2D Static Gaussian heat flux udf
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I’m facing a problem with the implementation of a 2d gaussian heat distribution (static).
The setup is simple, a steel plate with a top surface (where the heat flux is applied and the other surfaces are treated as a wall with a constant heat transfer coefficient.

The used udf is subsequently announced:
#include "udf.h"
#define rb 0.00235
#define f1 3
#define Q 1900

real x[ND_ND];
real y,y1;
face_t f;
y = x[1];
F_PROFILE(f,t,i) = (Q/rb*rb)*exp(-(f1*(y*y+y1*y1))/rb*rb);

The result should be a small heated spot (at X=0,Y=0) with a gaussian heat flux distribution but what I got is a plain heated area.

I don't know what is the problem with my udf, something should be wrong.
Maybe someone has a clue about this problem.

With best regards
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fluent -udf, heat flux udf, udf code

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