[subham998]

The cross-section of the domain is similar to a pipe. The objective is to heat metal particles located at a certain distance from the inlet of the pipe using a specified value of heat flux. I don't know the resulting temperature so I cannot specify the temperature of the particle using DPM Source Macro as:

#include "udf.h"
#include "dpm.h"
DEFINE_DPM_SOURCE(dpm_source,c,t,S,strength,p)
{
real xc[ND_ND]; // array of cell coordinates
C_CENTROID(xc,c,t); // retrieves the cell coordinates
if (xc[0] > 3) // only if this cell belongs in the domain where x > 3 m
{
P_T(p) = 500; //temperature of the metal particle increases to 500K
}
}

Any Suggestions?

[AlexanderZ]

you can use source term as mass, momentum and energy exchange terms for coupled DPM calculations

I'm not sure about syntax but idea is:

#include "udf.h"
#include "dpm.h"
DEFINE_DPM_SOURCE(dpm_source,c,t,S,strength,p)
{
real xc[ND_ND]; // array of cell coordinates
C_CENTROID(xc,c,t); // retrieves the cell coordinates
if (xc[0] > 3) // only if this cell belongs in the domain where x > 3 m
{
S->energy = 500; //heat source 500W/m3
}
}

if S->energy doesn't work, try other approach

#include "udf.h"
#include "dpm.h"
DEFINE_DPM_SOURCE(dpm_source,c,t,S,strength,p)
{
real xc[ND_ND]; // array of cell coordinates
real source = 0.0;
C_CENTROID(xc,c,t); // retrieves the cell coordinates
if (xc[0] > 3) // only if this cell belongs in the domain where x > 3 m
{
 source = 500; //heat source 500W/m3
}
return source;
}

best regards