[ptorres]

Hello,

I'm trying to get the velocity profile at the end of each iteration/time-step, so that I can make the inlet be the same.
Unfortunately, I only found out how to do it with Mass flow rate, and not the profile:

DEFINE_ADJUST(get_my_mass_flow,d)
{

#if !RP_HOST
  Thread *t = Lookup_Thread(d,zone_ID);
  face_t  f;
  real sum = 0.0;
  my_mass_flow = 0.5;
  

  /* Compute Mass Flow at Outlet */
  begin_f_loop(f,t)
  {
     my_mass_flow += F_PROFILE(f,t,i);
  }
  end_f_loop(f,t)
#endif

  my_mass_flow = PRF_GRSUM1(my_mass_flow);
  node_to_host_real_1(my_mass_flow);
}

DEFINE_PROFILE(apply_my_mass_flow,t,i)
{
   face_t f;
   begin_f_loop(f,t)
   {
     F_PROFILE(f,t,i) = my_mass_flow;
   }
   end_f_loop(f,t);
}

Is there anyway to do this for the velocity profile?

[pakk]

Are you now writing a UDF to implement a periodic boundary condition? This is already included in Fluent, you don't have to write anything for this...

[ptorres]

Hi pakk, thanks for the answer.
Unfortunately, I have two problems with that:

1-Being this periodic condition at the inlet and outlet, I can't seem to make this condition right, especcially because I have 2 inlets and 2 outlets, and the flow is oscillating, resulting in some high variations of both Mass flow and pressure gradient conditions, which must be established in the periodic conditions menu.

2-Since I have other periodic boundaries in the geometry, and in these the pressure gradient is always 0 (it's essentially just repeating the geometry sideways), I cannot create different periodic conditions for each periodic boundary, correct? At least I didn't find a way to make those conditions vary between boundaries.