Results 31 to 40 of about 1,125 (192)

Generalized self-similar spectrum and the effect of large-scale in decaying homogeneous isotropic turbulence

New Journal of Physics, 2018
In statistically stationary conditions, the turbulent energy spectrum in a high Reynolds number flow exhibits a k ^−5/3 (Kolmogorov) regime, with a faster decay at larger, dissipative wavenumbers.
Ping-Fan Yang, Alain Pumir, Haitao Xu
doaj   +1 more source

An overview of Millionschikov's quasi-normality hypothesis applied to turbulence

International Journal of Applied Mechanics and Engineering, 2014
In this paper, we examine the zero-fourth cumulant approximation that was applied to fluctuating velocity components of homogeneous and isotropic turbulence by M.D. Millionschikov.
C. Mamaloukas, H.P. Mazumdar
doaj   +1 more source

Secondary Flow near an Undulatory Surface Induced by Wall Blocking Effect

Journal of Fluid Science and Technology, 2007
Secondary mean motions of Prandtl's second kind near an undulatory surface are explained in terms of the turbulent blocking effect and kinematic boundary conditions at the surface, and the order of magnitude is estimated. The isotropic turbulence is
Kouji NAGATA, Peter A. DAVIDSON, Henry Y. W. WONG   +2 more
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Theory and Modelling of Isotropic Turbulence: From Incompressible through Increasingly Compressible Flows

Atmosphere
Homogeneous isotropic turbulence (HIT) has been a useful theoretical concept for more than fifty years of theory, modelling, and calculations. Some exact results are revisited in incompressible HIT, with special emphasis on the 4/5 Kolmogorov law.
Claude Cambon
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Triple Decomposition of Velocity Gradient Tensor in Compressible Turbulence

Fluids, 2021
The decomposition of the local motion of a fluid into straining, shearing, and rigid-body rotation is examined in this work for a compressible isotropic turbulence by means of direct numerical simulations.
Radouan Boukharfane, Aimad Er-raiy, Linda Alzaben, Matteo Parsani   +3 more
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Homogeneous and Isotropic Turbulence: A Short Survey on Recent Developments [PDF]

Journal of Statistical Physics, 2015
based on the talk presented by R. Benzi at DSFD 2-14. postprint version, published online on 6 July 2015 J.
BENZI, ROBERTO, BIFERALE, LUCA
openaire   +5 more sources

Turbulent Flame Propagation in Hydrogen-Air and Methane-Air Mixtures in the Field of Synthetic Turbulence: Direct Numerical Simulation

Eng, 2023
A technique alternative to the direct numerical simulation of turbulent combustion of gas mixtures is proposed. It is based on the solution of the three-dimensional transport equations for species concentrations and the energy conservation equation in ...
Valentin Y. Basevich, Andrey A. Belyaev, Fedor S. Frolov, Sergey M. Frolov   +3 more
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Lagrangian cascade in three-dimensional homogeneous and isotropic turbulence [PDF]

Journal of Fluid Mechanics, 2014
AbstractIn this work, the scaling statistics of the dissipation along Lagrangian trajectories are investigated by using fluid tracer particles obtained from a high-resolution direct numerical simulation with $\mathit{Re}_{\lambda }=400$. Both the energy dissipation rate $\epsilon $ and the local time-averaged $\epsilon _{\tau }$ agree rather well with ...
Huang, Yongxiang, Schmitt, François G
openaire   +3 more sources

Some Early Studies of Isotropic Turbulence: A Review

Atmosphere
A re-examination of some early classic turbulence literature, mainly of isotropic turbulence, is given in this selective review. Some early studies, including original concepts and points, are reviewed or highlighted.
John Z. Shi
doaj   +1 more source

Near-wake analysis of actuator line method immersed in turbulent flow using large-eddy simulations [PDF]

Wind Energy Science, 2018
The interaction between wind turbines through their wakes is an important aspect of the conception and operation of a wind farm. Wakes are characterized by an elevated turbulence level and a noticeable velocity deficit, which causes a decrease in ...
J. Nathan, C. Masson, L. Dufresne
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