Skin-friction and surface-pressure in a viscous flow constitute a pair of the intrinsically coupled physical quantities denoted by the notation (, ), which determines the near-wall flow structures. The exact (, ) relation derived from the Navier–Stokes (NS) equations provides a rational foundation for reconstruction of the (, ) structures in complex flows. Based on this coupling relation, a field can be obtained from the perturbed field for the given boundary enstrophy flux field of a base flow as an inverse problem in the first-order approximation. Then, the corresponding near-wall velocity field is reconstructed by using the Taylor-series-expansion solution of the NS equations. Some elemental and complex (, ) structures in three-dimensional flow separations are reconstructed to demonstrate the applicability of the proposed method.
Skin-Friction and Surface-Pressure Structures in Near-Wall Flows
AIAA Journal ; 56 , 10 ; 3887-3896
2018-05-31
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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