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Prediction of Turbulent Separated Boundary Layers
AIAA Journal, 1973Theme A integral boundary-layer method is extended to calculation of separated turbulent boundary layers by treating the pressure as a dependent variable and prescribing the wall shear variation. The boundary-layer method and a suitable potential flow method are used in an iterative procedure to produce a method for predicting the characteristics of ...
G. KUHN, J. NIELSEN
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Boundary layer separation in a rotating container
Physics of Fluids, 1996The flow field induced in a cylindrical container by the rotation of the container and/or the end wall(s) about the axis of symmetry is highly vortical. If the container and the end walls are rotated at different angular velocities, a meridional flow develops due to the tilting and stretching of the axial vorticity created by the rotation of the ...
Jahnke, Craig C., Valentine, Daniel T.
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Boundary-Layer Separation in Unsteady Flow
SIAM Journal on Applied Mathematics, 1975Extension of the familiar concept of boundary-layer separation to flow along moving walls and unsteady flows is a subject that attracted some interest in the 1950’s and has been investigated further in the past few years. The well-known criterion of vanishing wall-shear does not apply in such flows, and therefore the definition of the phenomenon ...
Sears, W. R., Telionis, D. P.
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Stability of Laminar Boundary Layers at Separation
The Physics of Fluids, 1967The stability of laminar boundary layers at separation is considered. The velocity distribution is represented by (1) a Pohlhausen fourth-degree polynomial P4, and (2) by a Falkner—Skan similarity profile at separation, Hartree β = − 0. 1988. The Orr—Sommerfeld equation is integrated using Runge—Kutta with Gram—Schmidt orthonormalization.
Wazzan, A. R. +2 more
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Boundary-Layer Separation From Downstream Moving Boundaries
Journal of Applied Mechanics, 1973The laminar boundary-layer equations for incompressible flow with a mild adverse pressure gradient were numerically solved for flows over downstream moving boundaries. It was demonstrated that the vanishing of skin friction in this case is not related to separation.2 Indeed the integration proceeds smoothly through a point of vanishing skin friction ...
Telionis, D. P., Werle, M. J.
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Control of a boundary layer separation
PAMM, 2007AbstractThe results of experimental study on a boundary layer separation control are given in the paper. The boundary layer on a flat wall is subjected to adverse pressure gradient. The active control strategy evolving a synthetic jet has been applied. The separation process is investigated using TR‐PIV method.
V. Uruba, M. Knob, L. Popelka
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Measurements in separating boundary layers
AIAA Journal, 1989In this paper we describe the application of pulsed-wire anemometry to the study of a two-dimensional separated flow generated by imposing a suitably adverse pressure gradient on a flat plate turbulent boundary layer. Accurate measurements of both mean velocity right down to the wall and skin friction have been made throughout the region approaching ...
M. Dianat, I. P. Castro
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Turbulence in a separated boundary layer
Journal of Fluid Mechanics, 1991This paper presents and discusses the results of an extensive experimental investigation of a flat-plate turbulent boundary subjected to an adverse pressure gradient sufficiently strong to lead to the formation of a large separated region. The pressure gradient was produced by applying strong suction through a porous cylinder fitted with a rear flap ...
M. Dianat, Ian P. Castro
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On turbulent boundary-layer separation
Journal of Fluid Mechanics, 1968An experimental and analytical study of the separation of a turbulent boundary layer is reported. The turbulent boundary-layer separation model proposed by Sandborn & Kline (1961) is demonstrated to predict the experimental results. Two distinct turbulent separation regions, an intermittent and a steady separation, with correspondingly different ...
V. A. Sandborn, C. Y. Liu
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2017
AbstractChapter 2 discusses the experimental observations of the boundary-layer separation in subsonic and supersonic flows that lead to a formulation of the concept of viscous-inviscid interaction. It then turns to the so-called ‘self-induced separation’ of the boundary layer in supersonic flows.
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AbstractChapter 2 discusses the experimental observations of the boundary-layer separation in subsonic and supersonic flows that lead to a formulation of the concept of viscous-inviscid interaction. It then turns to the so-called ‘self-induced separation’ of the boundary layer in supersonic flows.
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