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Old   October 25, 2013, 04:52
Question interpret UDF Error????
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hadi
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Hi
I have been a udf as follow:

#include "udf.h"
#include "mem.h"
DEFINE_GEOM(deforming,domain,dt,position)
{
cell_t c;
Thread *t;
real *position;
begin_c_loop_all(c,t)
{
position=0.2601*exp(-6.147e-05*C_P(c,t)) + 0.5091*exp(-0.0007079*C_P(c,t));
}
end_c_loop_all(c,t)
return;
}

After trying to interpret it, error reports was seen as follow:
Error: line 10: invalid type for pointer dereference: float.
How eliminate these error?
Anyhelp would be appreciated.
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Old   October 26, 2013, 18:05
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A-A Azarafza
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It seems that Fluent considers simple variable in equation as pointer. You can rearrange the equation. For instance, instead of 0.5*C_P(c,t), you'd better use C_P(c,t)*0.5.
I had the same error before. You need to do something like that.
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Old   October 27, 2013, 10:31
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Thanks a lot for your Answer

I want to deforming thickness variations of the pressure plate in each cell(Cells of the upper face plate):
y=0.2601*exp(-6.147e-X*0.5) + 0.5091*exp(X*(-0.0007079))
(X=pressure , Y= thickness variation).

for this purpose i writed below udf but incorect:

#include "udf.h"
#include "mem.h"
DEFINE_GEOM(deforming,domain,dt,position)
{
cell_t c;
Thread *t;
real *position;
begin_c_loop_all(c,t)
{
position=0.2601*exp(-6.147e-C_P(c,t)*0.5) + 0.5091*exp(C_P(c,t)*(-0.0007079));
}
end_c_loop_all(c,t)
return;
}

Error: line 10: parse error

can anyone help me in regarding with above problem….
thanks
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Old   October 27, 2013, 13:32
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It sounds that you've made mistaken in writing equation. I think, the problem is in the " -6.147e-C_P(c,t) " . what's "e -C_P(c,t) " here. Have a deeper look at correct it.
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Last edited by A CFD free user; October 28, 2013 at 17:01.
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Old   October 28, 2013, 04:52
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oh.yes.

Tanks
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