fluent dpm problem

- May 31, 2024 at 4:05 am
  Benson Meng
  Subscriber
  1. If the nebulizers spray in 2ml/4min from 2000particle hole, so the particle mass flow set 8.33e-6kg/s or 3.33e-9kg/s?
  2. If I spray the aerosols from the water by nebulizer, how do I set the the particle in dpm model? (water-vapor or water liquid) Thanks~
- June 4, 2024 at 9:02 am
  
  Rob
  Forum Moderator
  
  If you really want to set up 2000 injections the mass flow rate will be 2ml/4min/2000 : pick sensible units!
  Or given the droplet field is likely fairly uniform after a short distance you could inject from a surface. Note, you set the droplet diameter, mass flow etc and Fluent will add a number of parcels to represent the particles/droplets. The parcel and particle terms are used interchangably (and often incorrectly) but as that's been the case since the model was added it'll not be fixed anytime soon.
  If the droplets are water-liquid you set that DPM material. Note, you need to set up the injection before you can add in extra droplet materials. If there is no phase change it's an inert particle regardless of whether it's a solid, liquid or gas!