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Ansys Learning Forum › Forums › Discuss Simulation › Fluids › Modeling Particulate Matter (PM2.5) pollutants in a building › Reply To: Modeling Particulate Matter (PM2.5) pollutants in a building

March 4, 2024 at 5:13 pm
Rob
Forum Moderator

Relaxation time, it's how long it takes the particle to reach the flow speed. It's a parameter to work out if you need particles or if it's a species. 

If you want to model particles then you need to consider if you want DPM or Eulerian/Mixture based on volume fraction and how the different models behave. 

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