how to get pressure and pressure gradient using UDF
 

Hello every,

I am newer,:). I want to seeking help for UDF.The question is how to get pressure and pressure gradient for Specified boundary or cell adject the boundary after every time steps using UDF. Then setting mass flow rate which it is relation to the pressure and pressure gradien fo next time steps.

First, pressure and pressure gradient using UDF. The fllowing is my UDF code,
but I think it is not correct.

#include"udf.h"
real p ;
real detal p ;

DEFINE_EXECUTE_AT_END
{
Domain *d;

cell_t c;
Thread *t;
face_t f;
d = Get_Domain(1);
t= Lookup_Thread(d, 12);

begin_f_loop(f,t)
{
p = C_P(c,t);
detal p=C(c,t)[i][COLOR="Red"]

}
end_f_loop(f,t)

printf("static pressure = %g\n", p);
printf("pressure gradient= %g\n", detal p)

}


Thanks your help!!!!!!!!!!!!!!!!!