[qujiaqi]

hey guys,i am trying to define source term of energy eqution,like using DEFINE_SOURCE to define moving heat flux,it can be interpreted but there is nothing change with temperature.my UDF is:
#include "udf.h"

DEFINE_SOURCE(flux_profile,c,t,ds,eqn)
{
real d[ND_ND];
real x;
real y;
real z;
real flow_time = RP_Get_Real("flow-time");
real source;
C_CENTROID(d,c,t);
x = d[0];
y = d[1];
z = d[2];
source = 7e18* exp(-3 * (pow((x- 0.03 * flow_time),2)+pow((y-0.003),2)+(pow((z-0.0015),2)))/0.0003/0.0003);
ds[eqn] = 0.0;
return source;
}

i hope you can help me ,thank you so much~~

[AlexanderZ]

#include "udf.h"

DEFINE_SOURCE(flux_profile,c,t,ds,eqn)
{
real d[ND_ND];
real x;
real y;
real z;
real flow_time;
real source;
C_CENTROID(d,c,t);
flow_time = RP_Get_Real("flow-time")
x = d[0];
y = d[1];
z = d[2];
source = 7e18* exp(-3 * (pow((x- 0.03 * flow_time),2)+pow((y-0.003),2)+(pow((z-0.0015),2)))/0.0003/0.0003);
ds[eqn] = 0.0;
return source;
}