[pmghadge]

Hello,
I am trying to develop an UDF to find the velocity of Fluid at the different positions of particle in DPM. Finally I am interested in getting relative velocity of particle with respect to the fluid.

I am novice in the area of UDF, so please suggest me some macros which can be used for this.

Thank you very much.

[pmghadge]

/* Following UDF gives relative velocity I am looking for */
#include"udf.h"
real R_vel;
DEFINE_DPM_SCALAR_UPDATE(relative_vel,c,t,initiali ze,p)
{
real R_vx, R_vy, P_vel, F_vel;
/* Relative Velocity */
R_vx = C_U(c, t) - (P_VEL(p)[0]);
R_vy = C_V(c, t) - (P_VEL(p)[1]);
R_vel = sqrt( R_vx*R_v+x + R_vy*R_vy );
Message("Relative Velocity in X = %10f m/s and Y = %10f m/s\n",R_vx, R_vx);
Message("Relative Velocity= %10f m/s\n\n",R_vel);
}