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Difference in Source term of UDF for cylindrical coordinates compare to cartesian

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Old   November 2, 2020, 05:10
Default Difference in Source term of UDF for cylindrical coordinates compare to cartesian
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Vinay Chandrakar
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Hi Everyone,
I am trying to write a source term UDF for my 2D axisymmetric problem.

I already created source term UDF for square geometry (cartesian coordinates) which is mentioned below and working well.
#include "udf.h"

#define C2 -9.81

DEFINE_SOURCE(ymom_source,c,t)
{
real y[ND_ND];
real con, source;

C_CENTROID(y,c,t);
con = C2;

source = con*(0.06*C_T(c, t)-0.00416*C_T(c, t)*(C_T(c, t));

return source;
}
My question is if I want to do analysis of sphere instead of square (2D axisymmetric) do I have to change anything in this code?

And if it's required what is the way to modify it??

Thanks in advance.
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axisymmetric 2d fluent, cylindrical coordinates, udf source

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