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Fluid DynamicsPart 3 Boundary Layers$
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Anatoly I. Ruban

Print publication date: 2017

Print ISBN-13: 9780199681754

Published to Oxford Scholarship Online: January 2018

DOI: 10.1093/oso/9780199681754.001.0001

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Marginal Separation Theory

Marginal Separation Theory

Chapter:
(p.317) 5 Marginal Separation Theory
Source:
Fluid Dynamics
Author(s):

Anatoly I. Ruban

Publisher:
Oxford University Press
DOI:10.1093/oso/9780199681754.003.0006

Chapter 5 discusses the ‘short separation bubble’ that forms at the leading edge of an aerofoil when the angle of attack reaches a certain value. It then suggests that the process of the formation of the bubble is described by the Marginal Separation theory, which represents a special version of the triple-deck theory. It then covers how, in this case, the viscous-inviscid interaction problem may be reduced to an integro-differential equation for the skin friction. It discusses how by solving this equation not only the transition from attached to separated flow in the boundary layer be predicted, but also the well-known phenomenon of the ‘bubble bursting’ that leads to a sudden loss of the lift produced by an aerofoil.

Keywords:   Goldstein’s singularity, leading edge separation, separation bubble bursting, Marginal Separation theory, triple-deck theory, integro-differential equation, skin friction

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