How to specify species/mass diffusivity in pdf mixture

- October 11, 2019 at 9:58 pm
  
  roytorc
  Subscriber
  
  I'm using flamelet model to generate PDF table. I would like to test the sensitivity of the system to species diffusivity. However, in pdf mixture menu, I can only found UDS diffuivity box. Could you please advise how can I modify species diffusivity or is the UDS diffusivity is applied to species (pdf mixture) as well?
- October 12, 2019 at 5:33 am
  
  DrAmine
  Ansys Employee
  
  Not possible. Only transport properties like viscosity and thermal conductivity can be set. Check the manual.
- October 14, 2019 at 4:19 pm
  
  roytorc
  Subscriber
  
  Thank you for your reply. I found that turbulent diffusivity bases on turbulent viscosity and Schmidt number. Can I modify PDF Schmidt number in SST k-omega model to reflect my problem?
- October 15, 2019 at 4:56 am
  
  DrAmine
  Ansys Employee
  
  Turb diffusivity is not what you asked for in the beginning.
  I won't mess with that turbulent stuff but you can adjust the turb. Schmidt number there.