Skin-Friction and Surface-Pressure Structures in Near-Wall Flows.
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| Title: | Skin-Friction and Surface-Pressure Structures in Near-Wall Flows. |
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| Authors: | Tianshu Liu1 |
| Source: | AIAA Journal. Oct2018, Vol. 56 Issue 10, p3887-3896. 10p. |
| Abstract: | Skin-friction τ and surface-pressure p in a viscous flow constitute a pair of the intrinsically coupled physical quantities denoted by the notation (τ, p), which determines the near-wall flow structures. The exact (τ, p) relation derived from the Navier-Stokes (NS) equations provides a rational foundation for reconstruction of the (τ, p) structures in complex flows. Based on this coupling relation, a τ field can be obtained from the perturbed p 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 (τ, p) structures in three-dimensional flow separations are reconstructed to demonstrate the applicability of the proposed method. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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