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Problem in compiling UDF with ANSYS Fluent 17.1 and Visual Studio 14.0

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Old   October 27, 2016, 06:03
Default Problem in compiling UDF with ANSYS Fluent 17.1 and Visual Studio 14.0
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Hi guys,

I have a problem compiling my UDF file with the above mentioned software. The function contains a math header that needs to be used. Here the simple code:

Code:
#include "udf.h"
#include <math.h>

#define F = 100;
#define w = 0.85;
#define x_wheel = 0;
#define y_wheel = 0.4;

DEFINE_SOURCE(xmom_source,c,t,ds,eqn)
{
real theta, source;
real x_diff;
real y_diff;
real x[ND_ND];

C_CENTROID(x,c,t);
x_diff = x[0]-x_wheel;
y_diff = x[1]-y_wheel;
theta = atan (x_diff/y_diff);
source = F*(sqrt (x_diff*x_diff+y_diff*y_diff)*w)*(sqrt (x_diff*x_diff+y_diff*y_diff)*w)*cos (theta);
ds[eqn] = 2*F*(sqrt (x_diff*x_diff+y_diff*y_diff)*w)*cos (theta);
return source;
}
It should mimic the force of a paddle wheel on an open water flow as it is depicted in principle here:



And this is the error message:

Quote:
..\..\src\PaddleWheel.c(17): error C2059: syntax error: '='
..\..\src\PaddleWheel.c(18): error C2059: syntax error: '='
..\..\src\PaddleWheel.c(20): error C2059: syntax error: '='
..\..\src\PaddleWheel.c(20): error C2143: syntax error: missing ';' before ')'
..\..\src\PaddleWheel.c(21): error C2059: syntax error: '='
..\..\src\PaddleWheel.c(21): error C2143: syntax error: missing ';' before ')'
I guess it has something to do with the math header that is not handled correctly. I already tried to follow the suggestions from the other threads but it didn't help. The big difference here is that the include files of Visual Studio 14 are distributed in another way than the previous versions. As far is I understood it right they are outsourced in a "Windows Kit" folder. How can I tell this to Fluent? I also tried already to copy the files to the VC\include directory of Visual Studio but that didn't help neither.

Unfortunately, I can't go back to an older Visual Studio Version as I need the current version for another program.

Please help me!
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Old   October 27, 2016, 06:33
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Remove the equals signs and semicolons from your preprocessor directives because these are currently included in the compiler.

Code:
#define F 100
#define w 0.85
#define x_wheel 0
#define y_wheel 0.4
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Old   October 27, 2016, 10:09
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Shame on me.
Problem solved!

Thanks!
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