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hkrueger August 6, 2013 15:26

DPM Cyclone Problem
 
Hello,

I constructed a simulation of cyclone with fluent but it's not working as it should.

Boundary conditions are as follows:
  • structured grid
  • RSM
  • second order upwind
  • velocity inlet
  • pressure outlet
  • different surface-DPM-injections
  • UDF to get information about the condition on different planes

My problem is that the cyclone does not have the efficiency it should have with particles smaller than 1,5e-06 and i can't see what error i could have made.


I'd be grateful for any help or advice.

hkrueger August 11, 2013 06:20

my mistake was to choose the spherical drag law.

particels under diameter 6,7 E-6m (standard air) has to use the Stokes-Cunningham Law.


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