Spray combustion modelling using pdf and dpm

- December 5, 2019 at 12:40 pm
  
  anu4anusai
  Subscriber
  
  I am modelling spray combustion in gas turbine combustors using dpm for spray (pressure swirl model) and non premixed combustion by generating pdf. I would like to know whether we can use parallel computing for dpm?
  
  If yes, how do we fix the number of streams?
  
  How do we conclude the convergence of the solution? My residuals are now fluctuating between e-2 and e-3.
- December 5, 2019 at 4:49 pm
  
  Rob
  Ansys Employee
  
  You can use parallel, but check the model settings against how your hardware (memory) is set up.
  
  If you mean the number of parcels, that'll depend on the model. To increase have a look at stochastic tracking.
  
  Convergence is measured in the same way as normal. With more particle streams you may find the model is more stable. Also read the manual section on DPM numerics.
- December 5, 2019 at 5:35 pm
  
  anu4anusai
  Subscriber
  
  My residuals are fluctuating at e-2 and e-3 and not coming beyond that.
- December 6, 2019 at 4:31 am
  
  anu4anusai
  Subscriber
- December 6, 2019 at 8:49 am
  
  Rob
  Ansys Employee
  
  Keep going. I think you've turned transient particles on so you'll need to wait until the monitors etc level off.
- December 19, 2019 at 4:03 am
  
  anu4anusai
  Subscriber
  
  I dont seem to have convergence for any of the residuals as well as the other parameters. I am not able to understand if any mistakes are there in the case setup.

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