[Kabador]

Hello guys,

here is my UDF:

#include "udf.h"

real mass=0.0;

DEFINE_EXECUTE_AT_END(calcm)
{

#if !RP_HOST
cell_t c;
Domain *domain = Get_Domain(1);
int id_cellvolume = 3;
Thread *g = Lookup_Thread(domain, id_cellvolume);

begin_c_loop(c, g)
{
mass += C_R(c, g) * C_VOLUME(c, g);
}
end_c_loop(c, g)

mass = PRF_GRSUM1(mass);

#endif //Host

node_to_host_real_1(mass);

printf("Masse: %g\n", mass);
fflush(stdout);
}




DEFINE_PROFILE(p_input_Formen, t, i)
{
face_t f;
cell_t c;
real time = CURRENT_TIME;

begin_f_loop(f, t)
{
if (mass < 0.026)
F_PROFILE(f, t, i) = 101325;
else
F_PROFILE(f, t, i) = 1000;
}
end_f_loop(f, t)
}

i want to adjust the pressure of the pressure inlet depending on the accumulated mass in the volume.
I have one problem:
host is initialized with mass = 0.0, but this data is used as input in the define_profile UDF. I thought i could circumvent this by just sending the summed mass to the host.
But now the mass is summed with every time step and not set to zero, so after 3 time steps it accumulates to an mass amount thats not realistic.

How can i exclude the host from being used here?

Thanks

[Kabador]

Or do i have to save the calculated mass in a user memory, C_UDMI?