Reply To: Simulating DPM whose droplet material properties not available in database

[not.lah.enough]

Decided to write a UDF to calculate the total injection mass. The incomplete code is given below. The equation to calculate P_FLOW_RATE(p) is still missing since I don't know how to call the total fluid flow from the injection surface (it is supposed to be P_FLOW_RATE(p) = (total fluid flow rate in surface) * 0.08). Note that the entrained fluid flow rate is a calculated parameter and not determined from the start.

 

#include "udf.h"

#include "surf.h"

 

DEFINE_DPM_INJECTION_INIT(am_droplet, I)

{

int count, i;

/* real area, mw[MAX_SPE_EQNS], yi[MAX_SPE_EQNS]; */

/* MAX_SPE_EQNS is an ANSYS FLUENT constant in materials.h */

Particle* p;

cell_t cell;

Thread* cthread;

Material* mix, * sp;

Message("Initializing Injection: %s\n", I->name);

loop(p, I->p) /* Standard ANSYS FLUENT Looping Macro to get particle streams in an Injection */

{

P_FLOW_RATE(p) = ; /* dunno how to call total flow rate of fluid in the surface on which the injection occurs, flow rate unit is kg/s */

}

}