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body force as distance

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Old   May 4, 2014, 20:08
Default body force as distance
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I am trying to assign the body force for DPM model.
It is the magnetic force form and I've modified the existing udf file as follows.
When I compile it, I get the following warning message.

"warning C4700: uninitialized local variable 'x' used"

Could you help me if there is any problem with this udf?

Thanks in advance.

#include "udf.h"
#define Q 1.0
#define BZ 3.0
real x[ND_ND];
real bforce=0;
if(i==0) bforce=Q*BZ*P_VEL(p)[1]/sqrt(x[0]*x[0]+x[1]*x[1])/pow(10,10);
else if(i==1) bforce=-Q*BZ*P_VEL(p)[0]/sqrt(x[0]*x[0]+x[1]*x[1])/pow(10,10);
else bforce=0;
return (bforce/P_MASS(p));
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