[hamid1]

Hi

i want to calculate average pressure at the boundary,
the code is as follow?

DEFINE_PROFILE(outlet_catheter,thread,nv)

{
face_t f;
real NV_VEC (A);
T=RP_Get_Real("flow-time");
begin_f_loop(f,thread)
{
F_AREA (A,f,thread);
force+=F_P(f,thread)*NV_MAG(A);
P= force/(area of cross section);
VF = QF/(area of cross section);
F_PROFILE(f,thread,nv)=-VF;
}
end_f_loop(f,thread)
}

my question is for finding average pressure at the boundary which of the following is correct?

1.
F_AREA (A,f,thread);
force+=F_P(f,thread)*NV_MAG(A);
pressure = force/(area of cross section)
OR

2.

Pressure= F_P(f,thread);




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another question is can i use minus value in velocity inlet?

thanks alot for ur helps