[Peter_Beshay]

Hi,
I am trying to simulate in fluent particle deposition on plants (simulated as porous zone).
I need some help in making the following UDF work (or building a new one):
/////////////////////
#include "udf.h"
#include "sg_mem.h"
# include "dpm.h"
# define domain_ID 4
DEFINE_ADJUST(adjust_UDS,domain)
{
Thread *t;
cell_t c;
domain = Get_Domain(domain_ID);
/*Fill UDS with the variable*/
thread_loop_c (t,domain)
{
begin_c_loop (c,t)
{
C_UDSI(c,t,0) = C_DPMS_CONCENTRATION(c,t);
}
end_c_loop (c,t)
}
}
DEFINE_SOURCE(conc_source,c,t,dS,equ)
{
real x[ND_ND],c_source;
source= (C_UDSI(c,t,0) + C_UDSI(c,t,0));
return source;
}
///////////////////
Basically, i need the UDF to:
1- locate the domain of the porous zone (using domain ID)
2- Read the initial concentration
3- reduce this value by a percentage of it
4- store the new concentration value.

I really appreciate the help of anyone, it is very urgent