Results 151 to 160 of about 140,231 (211)
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Turbulence-Model Predictions for Turbulent Boundary Layers
AIAA Journal, 1974A set of turbulence model equations, originally postulated by Saffman, forms the basis of this three-part study of steady turbulent-boundary-layer structure above a flat plate. In one part of the study the turbulence equations are integrated through the viscous sublayer by means of time-marching numerical integration techniques and the constant in the ...
Saffman, P. G., Wilcox, D. C.
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Unsteady Turbulent Boundary Layers and Separation
AIAA Journal, 1975The time dependent turbulent boundary-layer equations are integrated numerically with a two-layer eddy viscosity model (Cebeci-Smith formulation), for transient or oscillatory outer flows. Comparisons with previous theoretical results indicate that the present method is at least as good as the others.
Telionis, D. P., Tsahalis, D. Th.
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Compressible Turbulent Magnetohydrodynamic Boundary Layers
The Physics of Fluids, 1968A closed analytical model for compressible magnetohydrodynamic boundary layers is formulated by using transport equations for the turbulent fluctuations of species mass density, velocity, and temperature, and thus avoiding a priori relations between turbulent fluxes and mean flow quantities.
Argyropoulos, G. S. +2 more
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Journal of Engineering Physics, 1980
On the basis of a superposition model of turbulent eddies in contact with a solid wall, some new laws regarding the behavior of the turbulent boundary layer are established.
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On the basis of a superposition model of turbulent eddies in contact with a solid wall, some new laws regarding the behavior of the turbulent boundary layer are established.
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Turbulent Diffusion Considering Turbulent Boundary Layer
The Journal of the Japan Society of Aeronautical Engineering, 1968The problem of turbulent diffusion in this paper is to determine the downwind concentration of non-buoyant smoke emitted from a continuous elevated point-source in a turbulent airstream. This has been studied by many investigators, assuming the wind speed profile and turbulent diffusivity coefficients K in the turbulent boundary layer.
Nobuhiro UKEGUCHI +2 more
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The Aeronautical Journal, 1968
In this lecture I hope to bring together the two branches of turbulence studies, (1) the fundamental study of the physics and mathematics of turbulent flow and (2) the methods of calculating turbulent flow development which are used by aircraft designers and other fluid dynamicists. While it is entirely reasonable that aircraft designers should wish to
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In this lecture I hope to bring together the two branches of turbulence studies, (1) the fundamental study of the physics and mathematics of turbulent flow and (2) the methods of calculating turbulent flow development which are used by aircraft designers and other fluid dynamicists. While it is entirely reasonable that aircraft designers should wish to
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Uncoupled Turbulent Boundry Layers
1984The main distinction between the treatment of turbulent flow in this chapter and Chapter 7 and the treatment of laminar flows in Chapters 4 and 5 is that whereas the diffusivities of momentum and heat are known transport properties in laminar flow, the effective diffusivities in turbulent flow are not.
Tuncer Cebeci, Peter Bradshaw
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Coupled Turbulent Boundary Layers
1984As in Chapter 6, we begin with the statement that the main difference between laminar flows and turbulent flows is that the effective diffusivities in turbulent flow are unknown. In Chapter 6 the temperature and/or concentration differences were small enough not to affect the mean velocity field, and it was assumed without explicit comment that the ...
Tuncer Cebeci, Peter Bradshaw
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Turbulent Boundary-Layer Separation
Annual Review of Fluid Mechanics, 1989This article summarizes our present understanding of the physical behavior of two-dimensional turbulent separated flows, which occur due to adverse pressure gradients around streamlined and bluff bodies. The physical behavior of turbulence is flow dependent, so detailed experimental infor mation is needed for understanding such flows and modeling ...
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Equilibrium turbulent boundary layers
Journal of Fluid Mechanics, 1966Empirical information is extracted from constant-pressure flows and, on this basis alone, the equations of motion are solved for flows where the pressure gradient parameter, β = δ*(dp/dx)/τ0 is held constant. The experimental defect profiles of Clauser and the near-separating profile of Stratford are predicted quite well.The present work is an ...
G. L. Mellor, D. M. Gibson
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