Results 1 to 10 of about 60,173 (144)

Kappa Distributions and Isotropic Turbulence [PDF]

Entropy, 2019
In this work, the two-point probability density function (PDF) for the velocity field of isotropic turbulence is modeled using the kappa distribution and the concept of superstatistics.
Elias Gravanis, Evangelos Akylas, Constantinos Panagiotou, George Livadiotis   +3 more
doaj   +2 more sources

Design of an accessible turbulence chamber for laboratory experiments [PDF]

HardwareX
Homogeneous isotropic turbulence (HIT) chambers provide a valuable platform for experimentally studying turbulence across a wide range of systems. Existing designs are often characterized by high cost, complex fabrication requirements, and reliance on ...
Madeline E. Federle, Benjamin Lyons, Mithun Ravisankar, Roberto Zenit   +3 more
doaj   +2 more sources

The Spatial Structure of Passively Simulated Atmospheric Boundary Layer Turbulence

Applied Sciences, 2021
Three types of turbulence fields were investigated using a research method combining wind tunnel tests and theoretical analysis to further explore the spatial structure of atmospheric boundary layer turbulence, which was passively simulated by a wind ...
Jiadong Zeng, Zhitian Zhang, Mingshui Li, Zhiguo Li   +3 more
doaj   +1 more source

Experimental study on the effect of turbulence on hot-smoke dispersion ejecting in a cross flow

Journal of Thermal Science and Technology, 2022
This study aims to investigate the hot-smoke dispersion behavior released from a chimney in a cross flow experimentally using specially designed wind tunnel.
Xangpheuak INTHAVIDETH, Nobumasa SEKISHITA, Sounthisack PHOMMACHANH, Yuji NAKAMURA   +3 more
doaj   +1 more source

Liutex-Represented Vortex Spectrum in Turbulence

Entropy, 2022
The Liutex vector is new quantity introduced to represent the rigid-body rotation part of fluid motion and thus to define and identify vortices in various flows. In this work, the intermittency and power-law similarity of the Liutex vector in homogeneous,
Bowen Yan, Yiqian Wang, Chaoqun Liu
doaj   +1 more source

Effects of hydrogen addition and turbulence on ignition and meso-scale flames of propane mixtures

Journal of Thermal Science and Technology, 2022
This study has investigated experimentally the effects of hydrogen addition and turbulence on the ignition and the flame-kernel development characteristics in isotropic and homogeneous turbulence for propane mixtures.
Masaya NAKAHARA, Kodai TANIMOTO, Hisanobu KUDO, Yuta MARUYAMA, Fumiaki ABE   +4 more
doaj   +1 more source

“Equilibrium” and “non-equilibrium” turbulence

Theoretical and Applied Mechanics Letters, 2017
We review the concept of “equilibrium” in turbulence. It generally means a property of the energy spectrum, it can also be understood in terms of a scalar property, the Taylor–Kolmogorov formula relating the dissipation rate to the total energy and ...
Robert Rubinstein, Timothy T. Clark
doaj   +1 more source

Gaussian multiplicative Chaos for symmetric isotropic matrices [PDF]

, 2012
Motivated by isotropic fully developed turbulence, we define a theory of symmetric matrix valued isotropic Gaussian multiplicative chaos. Our construction extends the scalar theory developed by J.P.
A.N. Kolmogorov, A.N. Kolmogorov, B. Collins, B. Duplantier, B.B. Mandelbrot, C. Foias, E. Bacry, E. Brézin, F. David, G. Anderson, I. Benjamini, J. Duchon, J.-P. Kahane, L. Chevillard, L. Chevillard, Laurent Chevillard, M. Bergère, M.L. Mehta, O.Y. Pasenchenko, R. Rhodes, R. Rhodes, R. Robert, R. Robert, Rémi Rhodes, S. Albeverio, T. Gneiting, U. Frisch, V.G. Knizhnik, Vincent Vargas   +28 more
core   +4 more sources

On the thixotropic effect of turbulence

Theoretical and Applied Mechanics Letters, 2019
As a follow-up research of the work on the natural viscosity of turbulence of Huang et al. [Journal of Turbulence (2003)], here we investigate the thixotropic effect of a turbulent Newtonian fluid on the basis of the ensemble-averaged Navier–Stokes ...
Yu-Ning Huang
doaj   +1 more source

von Kármán-Howarth and Corrsin equations closures through Liouville theorem

Results in Physics, 2020
In this communication, the closure formulas of von Kármán-Howarth and Corrsin equations are obtained through the Liouville theorem and the hypothesis of homogeneous isotropic incompressible turbulence.
Nicola de Divitiis
doaj   +1 more source