Results 151 to 160 of about 33,900 (190)

Homogeneous isotropic turbulence: large momentum expansion

Physica A: Statistical Mechanics and its Applications, 1999
High temperature expansion is an effective tool for studying second order phase transitions. With this in mind, we have looked at a high momentum expansion for homogeneous isotropic turbulence. Combining our results with those of the inertial range, we give another view of extended self-similarity (ESS).
Bhattacharjee, Jayanta Kumar, Sain, Anirban   +1 more
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Lattice Boltzmann simulations of decaying homogeneous isotropic turbulence

Physical Review E, 2005
Decaying homogeneous isotropic turbulence in inertial and rotating reference frames is investigated to evaluate the capability of the lattice Boltzmann method in turbulence. In the inertial frame case, the decay exponents of kinetic energy and dissipation and the low wave-number scaling of the spectrum are studied.
Huidan, Yu, Sharath S, Girimaji, Li-Shi, Luo   +2 more
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A theory of homogeneous isotropic turbulence

Applied Scientific Research, 1959
Homogeneous and isotropic turbulence has been discussed in the present paper. An attempt has been made to find the simplifying hypothesis for connecting the higher order correlation tensor with the lower ones. Starting from the Navier-Stokes equations of motion for an incompressible fluid and following the usual method of taking the averages, a ...
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Particle-Turbulence Interaction in a Homogeneous, Isotropic Turbulent Suspension

Applied Mechanics Reviews, 2006
A review is given of numerical, analytical, and experimental research regarding the two-way coupling effect between particles and fluid turbulence in a homogeneous, isotropic turbulent suspension. The emphasis of this review is on the effect of the suspended particles on the spectrum of the carrier fluid, in order to explain the physical mechanisms ...
Christian Poelma, Gijs Ooms
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The decay of homogeneous isotropic turbulence

Physics of Fluids A: Fluid Dynamics, 1992
A new theory for the decay of homogeneous, isotropic turbulence is proposed in which truly self-preserving solutions to the spectral energy equation are found that are valid at all scales of motion. The approach differs from the classical approach in that the spectrum and the nonlinear spectral transfer terms are not assumed a priori to scale with a ...
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Intermittent vortex structures in homogeneous isotropic turbulence

Nature, 1990
ALTHOUGH well developed turbulence exhibits complex, chaotic spatial and temporal behaviour, there is much experimental evidence to suggest that a remarkable degree of coherence is also present1. It is known2 that correlations in small-scale turbulent motions show significant deviations from the gaussian statistics usually expected for large, randomly ...
Zhen-Su She, Eric Jackson, Steven A. Orszag   +2 more
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Homogeneous, Isotropic Flow in Grid Generated Turbulence

Journal of Fluids Engineering, 1999
Detailed grid generated turbulent analysis has been completed using a three-dimensional hot-wire anemometer and traversing mechanism to identify a homogeneous, isotropic flow region downstream of a square mesh. The three-dimensional fluctuating velocity measurements were recorded along the centerline of a wind tunnel test section and spatially over the
Riccardo Tresso, David R. Munoz
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Lagrangian velocity correlations in homogeneous isotropic turbulence

Physics of Fluids A: Fluid Dynamics, 1993
The Lagrangian velocity autocorrelation and the time correlations for individual wave-number bands are computed by direct numerical simulation (DNS) using the passive vector method (PVM), and the accuracy of the method is studied. It is found that the PVM is accurate when Kmax/kd≥2 where Kmax is the maximum wave number carried in the simulation and kd ...
Gotoh, Toshiyuki, Rogallo, Robert S., Herring, Jackson R., Kraichnan, Robert H.   +3 more
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Inequalities in isotropic homogeneous turbulence theory

Journal of Mathematical Physics, 1981
It is postulated that the energy spectrum function is the Laplace transform of a nonnegative distribution φ. The principal physical parameters in the longitudinal correlation function are then expressed in terms of φ integrals and interrelated by Hölder inequalities, to yield experimentally confirmed results like Lp⩾1.825λ.
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Liquid drop breakup in homogeneous isotropic turbulence

International Journal of Numerical Methods for Heat & Fluid Flow, 2019
Purpose This paper aims to demonstrate the capabilities of a diffuse interface free energy lattice Boltzmann method to perform direct numerical simulations of liquid–liquid dispersions in a well-controlled turbulent environment. The goal of this research study is to develop numerical techniques that can visualize and quantify drop interaction with the
Cheng Zhong, Alexandra Komrakova
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