Multiscale velocity gradients in turbulence

PL Johnson, M Wilczek - Annual Review of Fluid Mechanics, 2024 - annualreviews.org
Understanding and predicting turbulent flow phenomena remain a challenge for both theory
and applications. The nonlinear and nonlocal character of small-scale turbulence can be …

Lagrangian dynamics and models of the velocity gradient tensor in turbulent flows

C Meneveau - Annual Review of Fluid Mechanics, 2011 - annualreviews.org
Many fundamental and intrinsic properties of small-scale motions in turbulence can be
described using the velocity gradient tensor. This tensor encodes interesting geometric and …

Distinguished material surfaces and coherent structures in three-dimensional fluid flows

G Haller - Physica D: Nonlinear Phenomena, 2001 - Elsevier
We prove analytic criteria for the existence of finite-time attracting and repelling material
surfaces and lines in three-dimensional unsteady flows. The longest lived such structures …

A public turbulence database cluster and applications to study Lagrangian evolution of velocity increments in turbulence

Y Li, E Perlman, M Wan, Y Yang, C Meneveau… - Journal of …, 2008 - Taylor & Francis
A public database system archiving a direct numerical simulation (DNS) data set of isotropic,
forced turbulence is described in this paper. The data set consists of the DNS output on …

[图书][B] Introduction to symmetry analysis

BJ Cantwell - 2002 - books.google.com
Page 1 CAMBRIDGE TEXTS IN APPLIED MATHEMATICS Introduction to Symmetry
Analysis BRIAN J. CANTWELL Page 2 Introduction to Symmetry Analysis Symmetry …

Invariants of the velocity-gradient, rate-of-strain, and rate-of-rotation tensors across the turbulent/nonturbulent interface in jets

CB da Silva, JCF Pereira - Physics of fluids, 2008 - pubs.aip.org
The invariants of the velocity gradient (⁠ R and Q⁠), rate-of-strain (⁠ RS and QS⁠), and rate-
of-rotation (QW) tensors are analyzed across the turbulent/nonturbulent (T/NT) interface by …

[图书][B] An informal introduction to turbulence

A Tsinober - 2001 - books.google.com
Pharmacovigilance is, in essence, the process of monitoring the everyday use of medicines
to identify previously unrecognized adverse drug reactions thereby assessing their …

Topology of fine-scale motions in turbulent channel flow

HM Blackburn, NN Mansour… - Journal of Fluid …, 1996 - cambridge.org
An investigation of topological features of the velocity gradient field of turbulent channel flow
has been carried out using results from a direct numerical simulation for which the Reynolds …

Lagrangian measurement of vorticity dynamics in turbulent flow

B Lüthi, A Tsinober, W Kinzelbach - Journal of Fluid mechanics, 2005 - cambridge.org
Lagrangian measurement of vorticity dynamics in turbulent flow Page 1 J. Fluid Mech. (2005),
vol. 528, pp. 87–118. c 2005 Cambridge University Press doi:10.1017/S0022112004003283 …

A study of the evolution and characteristics of the invariants of the velocity-gradient tensor in isotropic turbulence

A Ooi, J Martin, J Soria, MS Chong - Journal of Fluid Mechanics, 1999 - cambridge.org
Since the availability of data from direct numerical simulation (DNS) of turbulence,
researchers have utilized the joint PDFs of invariants of the velocity gradient tensor to study …