Results 21 to 30 of about 60,257 (227)

Wavelet analysis of coherent structures and intermittency in forced homogeneous isotropic turbulence with polymer additives

Advances in Mechanical Engineering, 2017
Large eddy simulation was performed for forced homogeneous isotropic turbulence with/without polymer additives. Wavelet transform in one dimension and two dimensions were performed to investigate the multi-resolution features of coherent structures and ...
Lu Wang, Zhi-Ying Zheng, Wei-Hua Cai, Feng-Chen Li   +3 more
doaj   +1 more source

Scaling of Second-Order Structure Functions in Turbulent Premixed Flames in the Flamelet Combustion Regime

Fluids, 2020
The second-order velocity structure function statistics have been analysed using a DNS database of statistically planar turbulent premixed flames subjected to unburned gas forcing.
Peter Brearley, Umair Ahmed, Nilanjan Chakraborty, Markus Klein   +3 more
doaj   +1 more source

Cancellation exponents in isotropic turbulence and magnetohydrodynamic turbulence

Physical Review E, 2019
Small scale characteristics of turbulence such as velocity gradients and vorticity fluctuate rapidly in magnitude and oscillate in sign. Much work exists on the characterization of magnitude variations, but far less on sign oscillations. While averages performed on large scales tend to zero because of the oscillatory character, those performed on ...
Zhai, X. M., Sreenivasan, K. R., Yeung, P. K.   +2 more
openaire   +4 more sources

Information production in homogeneous isotropic turbulence [PDF]

Physical Review E, 2019
We study the Reynolds number scaling of the Kolmogorov-Sinai entropy and attractor dimension for three dimensional homogeneous isotropic turbulence through the use of direct numerical simulation. To do so, we obtain Lyapunov spectra for a range of different Reynolds numbers by following the divergence of a large number of orthogonal fluid trajectories.
Arjun Berera, Daniel Clark
openaire   +4 more sources

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
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

Inertial spheroids in homogeneous, isotropic turbulence [PDF]

Physical Review E, 2018
6 pages, 4 ...
Roy, Amal, Gupta, Anupam, Ray, Samriddhi Sankar   +2 more
openaire   +3 more sources

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
doaj   +1 more source

Distinct Turbulent Regions in the Wake of a Wind Turbine and Their Inflow-Dependent Locations: The Creation of a Wake Map

Energies, 2020
Wind turbines are usually clustered in wind farms which causes the downstream turbines to operate in the turbulent wakes of upstream turbines. As turbulence is directly related to increased fatigue loads, knowledge of the turbulence in the wake and its ...
Ingrid Neunaber, Michael Hölling, Richard J. A. M. Stevens, Gerard Schepers, Joachim Peinke   +4 more
doaj   +1 more source

Jackson R. Herring and the Statistical Closure Problem of Turbulence: A Review of Renormalized Perturbation Theories

Atmosphere, 2023
The pioneering applications of the methods of theoretical physics to the turbulence statistical closure problem are summarised. These are: the direct-interaction approximation (DIA) of Kraichnan, the self-consistent-field theory of Edwards, and the self ...
David McComb
doaj   +1 more source