Vertical axis wind turbine 2D, problem with the air distribution

- September 3, 2018 at 3:57 am
  
  Moh1993
  Subscriber
  
  while i simulating a Savonius rotor, this happened with me , the inner domain, the fluent read it as solid and the air dose not enter it, i made interface between the outer and inner domains, also i made the inner domain as moving mesh, the outer stationary.
  
  how to solve the problem ?
- September 3, 2018 at 4:11 am
  
  Keyur Kanade
  Ansys Employee
  
  Hi,
  
  Please change cell zone type to fluid under cell zone conditions.
  
  Let me know if this helps.
  
  Regards,
  
  Keyur
- September 3, 2018 at 4:21 am
  
  Moh1993
  Subscriber
  
  Hi,
  
  Thank you for reply
  
  actually both of cell zone conditions were set to a fluid
- September 3, 2018 at 5:33 am
  
  DrAmine
  Ansys Employee
  
  Can you go after initialization to the Mesh interfaces and list the interface to check the portion of overlapping and non-overlapping regions on your interface. The same can be done via Graphics under Mesh variables (Interface Overlap Fraction).
- September 3, 2018 at 6:32 am
  
  Moh1993
  Subscriber
  
  Can you go after initialization to the Mesh interfaces and list the interface to check the portion of overlapping and non-overlapping regions on your interface. The same can be done via Graphics under Mesh variables (Interface Overlap Fraction).
  
  sorry i cant understand how to do that , im using fluent 18.1
- September 3, 2018 at 7:33 am
  
  DrAmine
  Ansys Employee
  
  So you have understood it otherwise you were not able to post it. So it tells that only 28.5% of the interface is marked as interior which would explain the flow blockage (which could result from different mesh topologies, geometric misalignment, or the existence of large gaps). Please post a zoomed screenshot of the mesh where the interface might be checked.
- September 3, 2018 at 7:59 am
  
  Moh1993
  Subscriber
  
  Thank you for help
  
  this is some screenshots for the mesh at interface around the circle
- September 3, 2018 at 8:09 am
  
  DrAmine
  Ansys Employee
  
  So the mesh is depicting some regions with gaps and regions of misalignment and regions where both parts are overlapping each other. Either you go back to pre-processing and work on that (recommended) or (if really the interfaces needs to be 100% flow permeable) you can try recreating the interface with the Option "Matching" (I underline the word "You can Try")
- September 3, 2018 at 9:48 pm
  
  Raef.Kobeissi
  Subscriber
  
  is it safe to assume this is a 2D mesh?

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