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 …

Structure and dynamics of highly turbulent premixed combustion

AM Steinberg, PE Hamlington, X Zhao - Progress in Energy and …, 2021 - Elsevier
Turbulent premixed combustion involves simultaneous and mutually interacting fluid,
chemical, and transport phenomena spanning a wide range of spatial and temporal scales …

Dissipation and enstrophy in isotropic turbulence: resolution effects and scaling in direct numerical simulations

DA Donzis, PK Yeung, KR Sreenivasan - Physics of Fluids, 2008 - pubs.aip.org
Existing experimental and numerical data suggest that the turbulence energy dissipation
and enstrophy (ie, the square of vorticity) possess different scaling properties, while …

Self-attenuation of extreme events in Navier–Stokes turbulence

D Buaria, A Pumir, E Bodenschatz - Nature communications, 2020 - nature.com
Turbulent fluid flows are ubiquitous in nature and technology, and are mathematically
described by the incompressible Navier-Stokes equations. A hallmark of turbulence is …

Influence of thermal expansion on fluid dynamics of turbulent premixed combustion and its modelling implications

N Chakraborty - Flow, Turbulence and Combustion, 2021 - Springer
The purpose of this paper is to demonstrate the effects of thermal expansion, as a result of
heat release arising from exothermic chemical reactions, on the underlying turbulent fluid …

Geometry and interaction of structures in homogeneous isotropic turbulence

T Leung, N Swaminathan, PA Davidson - Journal of Fluid Mechanics, 2012 - cambridge.org
A strategy to extract turbulence structures from direct numerical simulation (DNS) data is
described along with a systematic analysis of geometry and spatial distribution of the …

Deformation of drops by outer eddies in turbulence

A Vela-Martín, M Avila - Journal of Fluid Mechanics, 2021 - cambridge.org
Drop deformation in fluid flows is investigated as an exchange between the kinetic energy of
the fluid and the surface energy of the drop. We show analytically that this energetic …

Renormalization group theory for fluid and plasma turbulence

Y Zhou - Physics Reports, 2010 - Elsevier
For the last several decades, renormalization group (RG, or RNG) methods have been
applied to a wide variety of problems of turbulence in hydrodynamics and plasma physics. A …

Variable-density effects in incompressible non-buoyant shear-driven turbulent mixing layers

JR Baltzer, D Livescu - Journal of Fluid Mechanics, 2020 - cambridge.org
The asymmetries that arise when a mixing layer involves two miscible fluids of differing
densities are investigated using incompressible (low-speed) direct numerical simulations …

[HTML][HTML] Effects of Lewis number on vorticity and enstrophy transport in turbulent premixed flames

N Chakraborty, I Konstantinou, A Lipatnikov - Physics of Fluids, 2016 - pubs.aip.org
The effects of Lewis number Le on both vorticity and enstrophy transport within the flame
brush have been analysed using direct numerical simulation data of freely propagating …