Results 241 to 250 of about 29,832 (302)
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Hydromagnetic turbulent shear flow—I
International Journal of Engineering Science, 1976Abstract Hydromagnetic turbulent shear flow between two infinite uniformly porous planes in the presence of (i) axial and (ii) transverse magnetic field was studied in Flow—I by adopting the semi-empirical approach first initiated by Kampe de Feriet[1] and developed later on by Pai[2,3] for studying turbulent shear flow through channels.
K.N. Mehta, R. Balasubramanyam
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Science, 1998
Achieving nuclear fusion in magnetically confined plasma has been frustrated by turbulence that rips the plasma apart. In his Perspective, Burrell discusses recent efforts to understand and control microturbulence-small-scale plasma eddies that dominate the loss of energy from tokamak plasmas. Such efforts include those reported by [ Lin et al. ][1] in
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Achieving nuclear fusion in magnetically confined plasma has been frustrated by turbulence that rips the plasma apart. In his Perspective, Burrell discusses recent efforts to understand and control microturbulence-small-scale plasma eddies that dominate the loss of energy from tokamak plasmas. Such efforts include those reported by [ Lin et al. ][1] in
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INSTABILITY AND TURBULENCE IN SHEAR FLOWS
1993Increasing attention is being paid to the large scale structure of turbulence and to the so-called “coherent” vortical structures which have been disclosed and studied for a number of turbulent shear flows in laboratory experiments and in numerical simulations.
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Prediction of Hemolysis in Turbulent Shear Orifice Flow
Artificial Organs, 1996AbstractThis study proposes a method of predicting hemolysis induced by turbulent shear stress (Reynolds stress) in a simplified orifice pipe flow. In developing centrifugal blood pumps, there has been a serious problem with hemolysis at the impeller or casing edge; because of flow separation and turbulence in these regions.
Masaaki, Tamagawa +2 more
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Turbulent shear flows of variable density
6th Aerospace Sciences Meeting, 1968Abstract : A study was made of the mean flow field of free turbulent layers of variable density showing that if the velocity distribution in a particular constant-density flow is known, it is possible to obtain the corresponding variable-density velocity field without the introduction of a compressible turbulent viscosity.
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1997
We will consider here developed turbulence submitted to a shear, both from a very simple statistical point of view (mixing-length theory) and from the coherent-structure point of view. We will be interested in flows such as free-shear flows (mixing layers, jets and wakes) and wall flows.
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We will consider here developed turbulence submitted to a shear, both from a very simple statistical point of view (mixing-length theory) and from the coherent-structure point of view. We will be interested in flows such as free-shear flows (mixing layers, jets and wakes) and wall flows.
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Management and Control of Turbulent Shear Flows
ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 1993AbstractThis survey will begin with a few historical aspects, describe some passive and active management methods, and discuss selected examples of manipulation of leading edge separation. It will then deal with some typical flow phenomena which are important for the manipulation of turbulent shear flows.
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Bursts in turbulent shear flows
The Physics of Fluids, 1976The burst frequency or frequency of regions in a turbulent flow where the energy dissipation is large has been measured in both laboratory and atmospheric shear flows. The laboratory measurements were made in two slightly heated flows, a boundary layer in zero pressure gradient and an axisymmetric jet with a co-flowing external system.
R. A. Antonia, H. Q. Danh, A. Prabhu
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Numerical simulations of turbulent shear flows
Applied Scientific Research, 1993We simulate three-dimensional mixing layers, isotropic turbulence, and rotating turbulence. In the mixing-layer case, we show that high compressibility inhibits helical pairings obtained in the incompressible case, yielding a staggered array of large A-shaped vortices.
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Model Equations for Turbulent Shear Flow
Studies in Applied Mathematics, 1974A set of model equations for the calculation of turbulent shear flows is presented. It is shown how the equations can be modified to allow for the inclusion of viscosity, compressibility and density variations. Some results of numerical computations are given.
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