[atello28]

I wanted to interpret the udf below, which would give heat flux on a surface of a domain, but I encountered the errors at the end of the this note. The heat flux is getting greater when the radius gets bigger.

#include "udf.h"

DEFINE_PROFILE(heat_flux,thread,i)

{

real x[ND_ND];

real radius;

real omega;

real tau;

omega=62.83;

tau=20e6;

face_t f;

begin_f_loop(f,thread)

{

F_CENTROID (x,f,thread);

radius=sqrt(x[0]*x[0]+x[1]*x[1]);

F_PROFILE(f,thread,i) = radius*omega*tau

}

end_f_loop(f,thread);

}




line 19: parse error

line 21: f: undeclared variable

[`e`]

Declare all of your variables at the start of the code block (a requirement of ANSI C which Fluent uses). For example, move "face_t f;" above "omega=62.83;".

[atello28]

Dear 'e',

I have done what you have said and encountered other errors, can you help me about those as well?

The new UDF and the errors are listed below:

#include "udf.h"

DEFINE_PROFILE(heat_flux,thread,i)

{

real x[ND_ND];

real radius;

real omega;

real tau;

face_t f;

omega=62.83;

tau=20e6;

begin_f_loop(f,thread)

{

F_CENTROID (x,f,thread);

radius=sqrt(x[0]*x[0]+x[1]*x[1]);

F_PROFILE(f,thread,i) = radius*omega*tau

}

end_f_loop(f,thread);

}


line 31 : parse error
line 36: parse error

[atello28]

Dear 'e',

I found the error by myself:

A semicolon was missing after the line F_PROFILE(f,thread,i) = radius*omega*tau

After I corected it, the interpretation was done without errors but this time I encountered the error below. What can it be the reason?

Thank you in advance...

Atilla



C:\PROGRA~1\ANSYSI~1\v145\fluent\fluent14.5.0\win6 4\3ddp\fl1450s.exe received fatal signal (ACCESS_VIOLATION)
1. Note exact events leading to error.
2. Save case/data under new name.
3. Exit program and restart to continue.
4. Report error to your distributor.

[`e`]

Looks like Fluent is trying to access something that isn't available. Try compiling the UDF instead of interpreting.