Seven identical inlets to the volute, how should I define the interface?

- February 5, 2021 at 3:06 am
  
  Deus Ex Machina
  Subscriber
  
  Hi all
  I am studying a turbocharger on CFX: 7 sectors.
  I have done the whole turbocharger machine (7 sectors): inlet, impeller, diffuser and volute, it has about 26 million elements.
  At the workstation the computation time is expensive (around 15 hours) and I am thinking of reducing the problem by sacrificing some of the model, so I want to compute 1 sector, instead of 7, and then copy the outlet periodically around the input of the volute (360º).
  So I reduce the mesh to about 5 million elements (a big simplification):
  My problem is that I don't know how to define this condition in CFD-pre. The volute-diffuser interface is mixing-plane type.
  In short, the turbocharger with all sectors modeled is:
- February 10, 2021 at 6:59 pm
  
  RK
  Ansys Employee
  
  Hello, nAs Ansys employees, we will not be able to download the attachment. Can you please insert an image instead so that we could assist you better. Thank you. n
- February 11, 2021 at 2:05 am
  
  Deus Ex Machina
  Subscriber
  
  Hello, As Ansys employees, we will not be able to download the attachment. Can you please insert an image instead so that we could assist you better. Thank you.https://forum.ansys.com/discussion/comment/106372#Comment_106372
  nInlet, stacionary . No rotationnImpeller. Rotation, shroud counter wall velocity.nDiffuser, stacionary. No rotationnInterfase Volute to Diffuser: fluid-fluid, pitch: automatic. General connection, mixing-plane (stage)n

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