68th Annual Meeting of the APS Division of Fluid Dynamics (November 22, 2015 — November 24, 2015)

V0078: Turbulent flow around a wing profile, a direct numerical simulation

  • Mohammad Hosseini, KTH Mechanics, Stockholm, Sweden
  • Ricardo Vinuesa, KTH Mechanics, Stockholm, Sweden
  • Ardeshir Hanifi, KTH Mechanics, Stockholm, Sweden
  • Dan Henningson, KTH Mechanics, Stockholm, Sweden
  • Philipp Schlatter, KTH Mechanics, Stockholm, Sweden
DOI: https://doi.org/10.1103/APS.DFD.2015.GFM.V0078

A three dimensional direct numerical simulation using high-order methods has been performed to study the flow around the asymmetric NACA-4412 wing at a moderate chord Reynolds number (Rec = 400, 000), with an angle of attack of 5 degrees. This flow regime corresponds approximately to the flow around a small glider. In addition to providing higly accurate data, high-order methods produce massive amount of data enabling proper flow visualization. For instance, in this study vortical structures emerging from tripping the flow to turbulence are visualized using the \(\lambda_2\)criterion. It is interesting to see how interaction of such vortical structures from the turbuelnt boundary layer and the turbulent wake creates a natural art of its own. 

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