CFD Online Discussion Forums - error in mass diffusivity UDF

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error in mass diffusivity UDF

Hello all,
I wrote my first UDF for giving different mass diffusivity for different zones, but I am getting following error in interpretation:

cpp -I"C:\Fluent.Inc\fluent6.3.26/src" -I"C:\Fluent.Inc\fluent6.3.26/cortex/src" -I"C:\Fluent.Inc\fluent6.3.26/client/src" -I"C:\Fluent.Inc\fluent6.3.26/multiport/src" -I. -DUDFCONFIG_H="<udfconfig.h>" "E:\vaibhav\with_HAMP\DIFF.c"
Error: E:\vaibhav\with_HAMP\DIFF.c: line 1: parse error.

my UDF was following:

#include "udf.h"
DEFINE_DIFFUSIVITY(DIFF,c,t,i)
{
real diff;
int zone_ID = THREAD_ID(t);
if (zone_ID==2)
{
if(i==0)
DIFF= 5.22e-7;
else
DIFF=5.22e-7;
}
else
{
if(i==0)
DIFF=2.6e-5;
else
DIFF=2.6e-5;
}
return DIFF;
}

please help me

Vaibhav

I have no trouble with the following:

Code:

#include "udf.h"

DEFINE_DIFFUSIVITY(DIFFU,c,t,i)

{

real DIFF;

int zone_ID = THREAD_ID(t);

if (zone_ID==2)

{

if(i==0)

DIFF= 5.22e-7;

else

DIFF=5.22e-7;

}

else

{

if(i==0)

DIFF=2.6e-5;

else

DIFF=2.6e-5;

}

return DIFF;

}

ComputerGuy