How is Total flow rate calculated in DPM?

- June 16, 2021 at 1:09 pm
  
  강유림
  Subscriber
  
  Hello.
  In the discrete phase model, i will inject the particles to the surface.
  1) Here, what does total flow rate mean?
  " mass flow rate = density * volume flow rate (=area*velocity)"
  The value calculated by this formula does not seem to be established.
  If you don't use this formula,
  2) how do i calculate the total flow rate?
- June 16, 2021 at 1:31 pm
  
  ai0013
  Subscriber
  
  As suggested by the acronym "DPM - Discrete Phase Model". Fluent injects a discrete mass flow rate.
  m_dot = rho*vel*Area is valid for a continuous phase
  
  However, for particles the mass flow rate is
  m_dot = # of particles / sec * mass of particle
  
  That is why you need to both specify mass flow rate and velocity in the DPM injection panel. The latter has nothing to do with the above mentioned formula, so should be an independent input