[touyet]

Hi

currently I'm working on filter efficiency. and I already know penetration Efficiency of filter in each particle size.

To try this on fluent simulation, I want put udf about DPM in porous jump.

My plan is generate random number on each particle (like 0 to1) and if particle has low random number than filter penetration Efficiency, the particle considered to pass through (PATH_ACTIVE ; ) (I checked this Pass Active condition in my doamin, but it seems to reflect particles in porous jump BC)
Else, particle considered to Capture (PATH_ABORT ; )


Problem is.. How can I modifie my UDF to some particles can passing through the porous jump plane

[touyet]

DEFINE_DPM_BC(bc_filter,p,t,f,f_normal,dim)
{
int a;


/* Different Efficiency by Particle Diameter && Penentration Efficiency */
if ((P_DIAM(p)==0.000000005) && (P_USER_REAL(p,0) >= (0.266*32000)))
{p->gvtp.n_trapped+=1;
a=PATH_ABORT;}

else if ((P_DIAM(p)==0.000000020) && (P_USER_REAL(p,0) >= (0.750*32000)))
{p->gvtp.n_trapped+=1;
a=PATH_ABORT;}

else if ((P_DIAM(p)==0.000000050) && (P_USER_REAL(p,0) >= (0.885*32000)))
{p->gvtp.n_trapped+=1;
a=PATH_ABORT;}

else if ((P_DIAM(p)==0.000000100) && (P_USER_REAL(p,0) >= (0.922*32000)))
{p->gvtp.n_trapped+=1;
a=PATH_ABORT;}

else if ((P_DIAM(p)==0.000000300) && (P_USER_REAL(p,0) >= (0.881*32000)))
{p->gvtp.n_trapped+=1;
a=PATH_ABORT;}

else if ((P_DIAM(p)==0.000000780) && (P_USER_REAL(p,0) >= (0.616*32000)))
{p->gvtp.n_trapped+=1;
a=PATH_ABORT;}
else
{p->gvtp.n_Escaped+=1;
a=PATH_ACTIVE;}

return (int) a;

}

My Udf for filtering now and Active condition doesn't work as I intended
Plz someone help with this UDF

regards.

[ctw987]

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