Find Reynolds and Grashof numbers in heated circular channel using FLUENT

- November 12, 2018 at 6:09 pm
  
  omarjumaah
  Subscriber
  
  Hello all,
  
  I am modeling mixture of gases that flow in heated circular channel. The inlet gas mixture flow at 300 K, and the mixture passes heated zone at 100k. I found these equations to calculate Re & Gr #
  
  Re = rau(ref). vel(in). D(inlet)/miu (ref)
  
  Gr= g. rau(ref)^2.D^3.[Ts-Tin]/miu (ref)^2. T(ref)
  
  where rau=density; vel=inlet velocity; D=inlet diameter; miu= viscosity ; g=gravitational acceleration ; Ts=1000k; Tin=300k
  
  Tref=[Ts+Tin]/2
  
  my question is how can I get Re & Gr using Fluent, also how can I get the viscosity at the reference temperature.
  
  Thanks in advance
- November 13, 2018 at 3:03 am
  
  Keyur Kanade
  Ansys Employee
  
  You can use custom field function for Re and Gr.
  
  I believe to get viscosity at reference temperature, you may need to check handbooks.
  
  Please note that as ANSYS employee, we can not download attachments.

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