Results 111 to 120 of about 33,912 (215)

Eddy diffusivity in homogeneous isotropic turbulence

, 2019
We use the recently developed Macroscopic Forcing Method [Mani and Park, Physical Review Fluids, 6:054607, 2021] to compute the scale-dependent eddy diffusivity characterizing ensemble-averaged scalar and momentum transport in incompressible homogeneous isotropic turbulence. For scales larger than the energy containing eddies, eddy diffusivity is found
Shirian, Yasaman, Mani, Ali
openaire   +2 more sources

An implicit factorized transformer with applications to fast prediction of three-dimensional turbulence

Theoretical and Applied Mechanics Letters
Transformer has achieved remarkable results in various fields, including its application in modeling dynamic systems governed by partial differential equations.
Huiyu Yang, Zhijie Li, Xia Wang, Jianchun Wang   +3 more
doaj   +1 more source

Statistics of Finite Scale Local Lyapunov Exponents in Fully Developed Homogeneous Isotropic Turbulence

Advances in Mathematical Physics, 2018
The present work analyzes the statistics of finite scale local Lyapunov exponents of pairs of fluid particles trajectories in fully developed incompressible homogeneous isotropic turbulence.
Nicola de Divitiis
doaj   +1 more source

Conditional vorticity budget of coherent and incoherent flow contributions in fully developed homogeneous isotropic turbulence

, 2012
We investigate the conditional vorticity budget of fully developed three-dimensional homogeneous isotropic turbulence with respect to coherent and incoherent flow contributions.
Farge, Marie, Friedrich, Rudolf, Kadoch, Benjamin, Schneider, Kai, Wilczek, Michael   +4 more
core   +5 more sources

What is the smallest physically acceptable scale for 1D turbulence schemes ?

Frontiers in Earth Science, 2014
In numerical weather prediction (NWP) models, at mesoscale, the subgrid convective boundary-layer turbulence is dominated by the uni-directional (1D) vertical thermal production.
Rachel eHonnert, Valéry eMasson
doaj   +1 more source

Effects of axisymmetric contractions on turbulence of various scales [PDF]

Digitally acquired and processed results from an experimental investigation of grid generated turbulence of various scales through and downstream of nine matched cubic contour contractions ranging in area ratio from 2 to 36, and in length to inlet ...
Drubka, R. E., Nagib, H. M., Tan-Atichat, J.   +2 more
core   +1 more source

The effects of particle loading on turbulence structure and modelling [PDF]

The objective of the present research was to extend the Direct Numerical Simulation (DNS) approach to particle-laden turbulent flows using a simple model of particle/flow interaction.
Eaton, J. K., Squires, Kyle D.
core   +1 more source

Orifice versus Converging-Nozzle Grid Turbulence: A Wavelet Perspective

Applied Sciences
Grids such as perforated plates are of fundamental importance in flow turbulence study and are commonly utilised to promote mixing. An orificed perforated plate (OPP) and its reversed counterpart, the converging-nozzle perforated plate (CNPP), were ...
Ankit Raj, David S.-K. Ting, Yang Yang
doaj   +1 more source

Mass invariant in a compressible turbulent medium

Physical Review Research
Predicting the measurable statistical properties of density fluctuations in a supersonic compressible turbulent flow is a major challenge in physics.
Pierre Dumond, Jérémy Fensch, Gilles Chabrier, Etienne Jaupart   +3 more
doaj   +1 more source

Psuedospectral calculation of shock turbulence interactions [PDF]

A Chebyshev-Fourier discretization with shock fitting is used to solve the unsteady Euler equations. The method is applied to shock interactions with plane waves and with a simple model of homogeneous isotropic turbulence.
Hussaini, M. Y., Kopriva, D. A., Zang, T. A.   +2 more
core   +1 more source