C_CENTROID is not returning the cell center coordinates

jyothsna k · July 14, 2014, 09:52

My code is as below:
DEFINE_SOURCE(x_src,c,t,dS,eqn)
{
real source;
real x,y,z,r,h;
real xc[ND_ND];

C_CENTROID(xc,c,t);
x = xc[0];y=xc[1];z=xc[2];
r=sqrt(x*x+y*y); h=y/r;
t1=mu0*J;
if (z>=zl && z<=zu && r>=ri && r<=ro)
{source = -t1*h ;}
else
{source=0;}

C_UDMI(c,t,8) =x;
return source;
}

mu0, J, ri,ro have been defined as constants.
When i check the memory numbered 8 there are no values of x there. I have tried to incorporate a similar code in ADJUST. even there i'm facing the same problem. I have used this code before for another model with no problems. I'm unable to find the cause.
Thanks in advance

pakk · July 14, 2014, 17:49

Sorry if this is a silly question, but did you remember to attach the udf? Are you sure that it is actually run by Fluent?

jyothsna k · July 14, 2014, 23:53

Thank you for your response. I have attached all my UDFs and i have been using only fluent.

July 14, 2014, 09:52	C_CENTROID is not returning the cell center coordinates	#1
jyothsna k New Member jyothsna k Join Date: May 2014 Posts: 18 Rep Power: 12	My code is as below: DEFINE_SOURCE(x_src,c,t,dS,eqn) { real source; real x,y,z,r,h; real xc[ND_ND]; C_CENTROID(xc,c,t); x = xc[0];y=xc[1];z=xc[2]; r=sqrt(xx+yy); h=y/r; t1=mu0J; if (z>=zl && z<=zu && r>=ri && r<=ro) {source = -t1h ;} else {source=0;} C_UDMI(c,t,8) =x; return source; } mu0, J, ri,ro have been defined as constants. When i check the memory numbered 8 there are no values of x there. I have tried to incorporate a similar code in ADJUST. even there i'm facing the same problem. I have used this code before for another model with no problems. I'm unable to find the cause. Thanks in advance

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July 14, 2014, 17:49		#2
pakk Senior Member Join Date: Nov 2013 Posts: 1,965 Rep Power: 27	Sorry if this is a silly question, but did you remember to attach the udf? Are you sure that it is actually run by Fluent?

July 14, 2014, 23:53		#3
jyothsna k New Member jyothsna k Join Date: May 2014 Posts: 18 Rep Power: 12	Thank you for your response. I have attached all my UDFs and i have been using only fluent.