Results 251 to 260 of about 441,780 (278)

Generation of Reynolds Stress in Laboratory Plasmas

Physica Scripta, 2001
The contribution due to the turbulence to the shear layer formation has been evaluated by measuring the off-diagonal part of the Reynolds stress tensor in the magnetised plasma Thorello. Measurements have been performed through a four pin electrostatic probe along the plasma radius and in different discharge conditions.
RICCARDI, CLAUDIA, De Colle, F, Trasarti Battistoni, R, FONTANESI, MARCELLO   +3 more
openaire   +2 more sources

Modeling of the Reynolds Stress Transport Equation

AIAA Journal, 1997
An empirical strategy for improving modeling of the energy dissipation rate e ij and the velocity-pressure gradient Π ij terms in the transport equations for the Reynolds stresses is proposed on the basis of available direct numerical simulations of the turbulent boundary layer and fully developed turbulent channel flow.
Djenidi, L., Antonia, R. A.
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Reynolds stress in turbulent boundary layers at high Reynolds number

Journal of Turbulence, 2004
A two-dimensional turbulent boundary layer experiment with zero pressure gradient has been carried out over a smooth surface using two cross hot-wire probes. Wind tunnel speeds of 10 and 20 m s−1 were set up to investigate the effect of the upstream conditions and Reynolds number on the outer flow.
Junghwa Seo, Luciano Castillo, T Gunnar Johansson, Horia Hangan   +3 more
openaire   +1 more source

Generalizable Theory of Reynolds Stress

2021
We generalize the Lagrangian transport theory to include the normal and shear Reynolds stresses, so that a complete tensor can be constructed. The ideology is based on imposition of the momentum and energy balance to a control volume moving at the local mean velocity, which bears the effect of de-coupling the mean from the fluctuation components.
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Reynolds stresses for unsteady turbulent flows

AIAA Journal, 1983
References ^ottlieb, D. and Orszag, S. A., Numerical Analysis of Spectral Methods: Theory and Applications, National Science FoundationConference Board of the Mathematical Sciences Monograph No. 26, Society of Industrial and Applied Mathematics, Philadelphia, Pa., 1977, Sec. 3. Pulliam, T. H. and Steger, J.
Wilbur L. Hankey, Wladimiro Calarese
openaire   +1 more source

Reynolds Stress Models for Shock-Turbulence Interaction

2019
A systematic deficiency of current turbulence models which are based on the Reynolds-averaged Navier-Stokes equations (RANS) is their inability to correctly predict the interaction of turbulence with shocks. This is because RANS models do not account for the unsteady motion or fragmentation of the shock wave within the interaction zone.
Karl, Sebastian, Hickey, Jean Pierre, Lacombe, Francis   +2 more
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Differential Reynolds-Stress Modeling for Aeronautics

AIAA Journal, 2015
A comparison of two differential Reynolds-stress models for aeronautical flows is presented. The ω model herein combines the Speziale–Sarkar–Gatski pressure–strain model with the Launder–Reece–Rodi model toward the wall, where the length scale is supplied by Menter’s baseline ω equation.
Cécora, René-Daniel, Radespiel, Rolf, Eisfeld, Bernhard, Probst, Axel   +3 more
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Contribution towards a Reynolds-stress closure for low-Reynolds-number turbulence

Journal of Fluid Mechanics, 1976
The problem of closing the Reynolds-stress and dissipation-rate equations at low Reynolds numbers is considered, specific forms being suggested for the direct effects of viscosity on the various transport processes. By noting that the correlation coefficient$\overline{uv^2}/\overline{u^2}\overline{v^2} $is nearly constant over a considerable portion of
Hanjalic, K., Launder, B. E.
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REYNOLDS STRESSES IN CONFINED VORTEX FLOWS

Transactions of the Canadian Society for Mechanical Engineering, 1999
Reynolds stresses in confined vortex flows have been studied analytically and experimentally. Equations for the Reynolds shear stresses are derived based on the kinetic energy equations and experimental observations. The Reynolds shear stresses are obtained by solving the equations analytically.
L. Yan, S. Lin, G.H. Vatistas
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Developments in Measuring Reynolds Stresses

1987
Single, dual and multi-sensor hot-wire anemometry for measuring instantaneous velocities as well as time-averaged statistics in incompressible turbulent flows is reviewed with emphasis on accuracy of calibration and data reduction schemes and on methods applicable to high-intensity and recirculating flows.
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