Spatial optimal disturbances in swept attachment-line boundary layers

Alan Guégan; Peter J. Schmid; Patrick Huerre

doi:10.1017/S0022112008001067

Spatial optimal disturbances in swept attachment-line boundary layers

Alan Guégan, Peter J. Schmid, Patrick Huerre

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

A formulation based on direct and adjoint parabolized equations is developed to account for the spatial evolution of perturbations in swept attachment-line boundary layers. For sweep Reynolds numbers larger than Re = 100 the dynamics is dominated by a lift-up mechanism which is responsible for large energy amplification by transforming spanwise vortices into spanwise streaks. This mechanism favours steady perturbations with a chordwise scale that quantitatively matches its counterpart for classical Blasius boundary layers. © 2008 Cambridge University Press.

Original language	English (US)
Pages (from-to)	179-188
Number of pages	10
Journal	Journal of Fluid Mechanics
Volume	603
DOIs	https://doi.org/10.1017/S0022112008001067
State	Published - Jan 1 2008
Externally published	Yes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2022-09-13

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Condensed Matter Physics

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10.1017/S0022112008001067

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AB - A formulation based on direct and adjoint parabolized equations is developed to account for the spatial evolution of perturbations in swept attachment-line boundary layers. For sweep Reynolds numbers larger than Re = 100 the dynamics is dominated by a lift-up mechanism which is responsible for large energy amplification by transforming spanwise vortices into spanwise streaks. This mechanism favours steady perturbations with a chordwise scale that quantitatively matches its counterpart for classical Blasius boundary layers. © 2008 Cambridge University Press.

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JF - Journal of Fluid Mechanics

ER -

Spatial optimal disturbances in swept attachment-line boundary layers

Abstract

Bibliographical note

ASJC Scopus subject areas

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