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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.
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]
Copyright of AIAA Journal is the property of American Institute of Aeronautics & Astronautics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 173424943
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PubType: Academic Journal
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  Data: Skin-Friction and Surface-Pressure Structures in Near-Wall Flows.
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  Data: 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]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of AIAA Journal is the property of American Institute of Aeronautics & Astronautics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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              Text: Oct2018
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