solid-wall restitution coefficient boundary condition

- June 7, 2020 at 5:05 pm
  
  reza1374
  Subscriber
  
  the better value for restitution coefficient for solid-wall in hydrodynamic gas-solid bubbling fluidized bed?can i assming near one (elastic) for better result example 0.9 or 0.95 or 0.99?or near zero? in the article not mentioned.
  
  if not mentioned in article, can i assume granular flux is zero?
- June 8, 2020 at 5:30 am
  
  DrAmine
  Ansys Employee
  
  If nothing is mentioned I would keep it as default so elastic. Generally it will be a function of the impact angle which depends on the surface at impact and particle surface properties. In general tangential coefficient is lower at higher angle but remains higher than normal.

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