Multi profile wing layer thickness

- March 28, 2021 at 7:20 pm
  
  Federico2594
  Subscriber
  
  Hi,nI have a question regard to first layer thickness of multiprofile wing.nFor what about y+ value for turbulence model is everything is clear but, if I have a wing composed by 3 Naca Profiles for example, the inflation layer value (first layer thick) is different for every profile related to single profile chord? (or is only one related to wing chord?)nRegards,nFedericon
- March 29, 2021 at 1:33 pm
  
  Rob
  Ansys Employee
  
  The y+ value is assigned prior to meshing, however it's also a function of velocity and cell height which is why it's used to estimate the near wall cell height. You then run the solver where it's calculated, and can amend the mesh to suit. It's defined in the User's Guide, and is used very badly by most people explaining meshing. You do need to resolve the near wall cell, but also the flow boundary layer AND far field flow gradients. Getting y+ in the recommended limits just means you got one layer of cells in the right place..... n

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