Results 271 to 280 of about 63,038 (316)

On turbulent boundary-layer separation

Journal of Fluid Mechanics, 1968
An 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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Study of Separating Compressible Turbulent Boundary-Layers

14th AIAA/AHI Space Planes and Hypersonic Systems and Technologies Conference, 2006
The prediction of incipient separation due to shock wave interaction with a boundary layer is a critical prerequisite in the design of air-breathing engine inlets and combustors. These shock wave/boundary layer interactions occur in both two-dimensional and three-dimensional forms.
Dann, A. G., Denman, A. W., Jacobs, P A, Morgan, R G   +3 more
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Vorticity and Boundary Layer Separation

2021
Vorticity represents the underlying skeleton of fluid motion. The spatial distribution of vorticity characterizes the dynamic properties of fluid flow. When vorticity has a regular distribution, like when it is confined in the boundary layer next to the wall, the flow is regular and predictable.
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New Method for Supersonic Boundary-Layer Separations

AIAA Journal, 1974
An efficient numerical solution algorithm is presented for solving the interacting supersonic laminar boundarylayer problem. The method employs a time dependent approach with the alternating direction implicit (ADI) scheme and directly accounts for the necessary downstream boundary condition. Solutions are presented for MOO = 3 cold wall boundary-layer
Werle, M. J., Vatsa, V. N.
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Separation and the compressible boundary layer

Journal of Engineering Mathematics, 1971
The behavior of the compressible boundary layer equations close to a point of zero skin-friction is studied using a perturbation technique of Kaplun. The behavior of the skin friction is reduced to a study of a nonlinear integral equation with an Abel kernel. For a cold wall this yields the singular behavior described by Buckmaster [2] from a different
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Oscillating Laminar Boundary Layers and Unsteady Separation

AIAA Journal, 1974
Abstract : The unsteady laminar boundary equations are solved numerically for oscillating outer flow velocity distributions. Some characteristic features of oscillating boundary-layers are observed and checked against existing analytical and experimental data.
Tsahalis, D. Th., Telionis, D. P.
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Incompressible Boundary-Layer Separation

Annual Review of Fluid Mechanics, 1977
For high-Reynolds-number flow over bodies or in confined channels the effects of viscosity are generally limited to a thin layer, the boundary layer, adjacent to the bounding surface. When the imposed pressure gradient is adverse, however, the thickness of the viscous layer increases as momentum is consumed by both wall shear and pressure gradient, and
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Experimental study of an unsteady separating boundary layer

AIAA Journal, 1998
The objective of this research is to map the e owe eld around the trailing edge of a hydrofoil subject to transverse gust loading, to provide guidance for the formulation of an appropriate Kutta condition for inviscid solution methods. The hydrofoil is equipped with a trailing edge that incurs boundary-layer separation over the last few percent of the ...
E. A. Lurie, D. P. Keenan, J. E. Kerwin
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Numerical simulation of separated boundary-layer flow

Journal of Engineering Mathematics, 1997
We present numerical simulations of time-dependent two-dimensional compressible boundary layer flow containing a region of separation. The separation is generated by the introduction of an adverse pressure gradient along the freestream boundary. In order to validate the numerical method, a low Mach-number laminar separation bubble flow is considered ...
Wasistho, B., Geurts, B.J., Kuerten, J.G.M.   +2 more
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The Existence of Görtler Vortices in Separated Boundary Layers

Studies in Applied Mathematics, 1996
The linear stability properties of Görtler vortices within a general separated boundary layer flow are addressed. There has been little previous theoretical work directed toward this problem and here we are able to characterize the important features of vortices over the complete wavenumber spectrum.
Denier, James Patrick, Bassom, Andrew Peter   +1 more
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