Results 41 to 50 of about 33,802 (217)

Turbulence modulation in particle-laden stationary homogeneous isotropic turbulence using one-dimensional turbulence [PDF]

Physical Review Fluids, 2020
Turbulence modulation in particle-laden stationary homogeneous isotropic turbulence is investigated using one-dimensional turbulence (ODT), a low-dimensional stochastic flow simulation model. For this purpose, ODT is extended in two ways. First, a forcing scheme that maintains statistical stationarity is introduced.
Marco Fistler, Alan Kerstein, David O. Lignell, Michael Oevermann   +3 more
openaire   +1 more source

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
doaj   +1 more source

Correlation functions in isotropic and anisotropic turbulence: the role of the symmetry group

, 1998
The theory of fully developed turbulence is usually considered in an idealized homogeneous and isotropic state. Real turbulent flows exhibit the effects of anisotropic forcing.
A. N. Kolmogorov, A. S. Monin, G. Parisi, I. Arad, Itai Arad, Itamar Procaccia, J. F. Cornwell, O. Chkhetiani, R. Benzi, S. Sternberg, T. C. Halsey, U. Frisch, V. I. Belinicher, V. I. Belinicher, V. S. L’vov, V. S. L’vov, V. S. L’vov, Victor S. L’vov   +17 more
core   +2 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
doaj   +1 more source

Homogeneity and isotropy in a laboratory turbulent flow

, 2013
We present a new design for a stirred tank that is forced by two parallel planar arrays of randomly actuated synthetic jets. This arrangement creates turbulence at high Reynolds number with low mean flow.
Bellani, Gabriele, Variano, Evan A.
core   +1 more source

A numerical tool for the study of the hydrodynamic recovery of the Lattice Boltzmann Method [PDF]

, 2018
We investigate the hydrodynamic recovery of Lattice Boltzmann Method (LBM) by analyzing exact balance relations for energy and enstrophy derived from averaging the equations of motion on sub-volumes of different sizes.
Bartel, Andreas, Biferale, Luca, Ehrhardt, Matthias, Gupta, Abhineet, Sbragaglia, Mauro, Tauzin, Guillaume, Toschi, Federico   +6 more
core   +2 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
doaj   +1 more source

Rotation Rate of Particle Pairs in Homogeneous Isotropic Turbulence [PDF]

, 2015
Understanding the dynamics of particles in turbulent flow is important in many environmental and industrial applications. In this paper, the statistics of particle pair orientation is numerically studied in homogeneous isotropic turbulent flow, with ...
Daddi-Moussa-Ider, Abdallah, Ghaemi, Ali
core   +4 more sources

Microfluidic Mixing with the Dynamic Control of Magnetic Actuation

Advanced Intelligent Systems, EarlyView.
Schematic illustration and flow field visualization of magnetically actuated L‐shaped microrobots displaying cooperative vortex generation for enhanced microscale mixing. The left side shows the electromagnetic actuation setup, which enables programmable control of rotational direction and frequency.
Prashant Kishor Sharma, Tsung‐Yen Lu, Chia‐Yuan Chen   +2 more
wiley   +1 more source