Three-dimensional remeshed smoothed particle hydrodynamics for the simulation of isotropic turbulence
Sign Up to like & getrecommendations! Published in 2018 at "International Journal for Numerical Methods in Fluids"
DOI: 10.1002/fld.4405
Abstract: Summary We present a remeshed particle-mesh method for the simulation of three-dimensional compressible turbulent flow. The method is related to the mesh free smoothed particle hydrodynamic (SPH) method, but the present method introduces a mesh… read more here.
Keywords: three dimensional; isotropic turbulence; hydrodynamics; method ... See more keywords
Pseudo real-time continuous measurements of particle preferential concentration in homogeneous isotropic turbulence
Sign Up to like & getrecommendations! Published in 2020 at "Experimental Thermal and Fluid Science"
DOI: 10.1016/j.expthermflusci.2019.109968
Abstract: Abstract Preferential concentration is a phenomenon where particles in turbulent flow concentrate in regions of low vorticity and high strain rate, forming clusters. This phenomenon is prevalent in nature and various industrial environments. Previous measurement… read more here.
Keywords: pseudo real; isotropic turbulence; homogeneous isotropic; preferential concentration ... See more keywords
DNS study on heat transfer of viscoelastic decaying isotropic turbulence
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Heat and Fluid Flow"
DOI: 10.1016/j.ijheatfluidflow.2017.08.014
Abstract: Abstract Direct numerical simulation (DNS) on viscoelastic decaying isotropic turbulence was carried out to investigate heat transfer reduction (HTR) mechanism. The transport equations of thermal fluctuation energy and heat flux were derived in both physical… read more here.
Keywords: decaying isotropic; isotropic turbulence; dns; viscoelastic decaying ... See more keywords
Stochastic theory and direct numerical simulations of the relative motion of high-inertia particle pairs in isotropic turbulence
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2016.859
Abstract: The relative velocities and positions of monodisperse high-inertia particle pairs in isotropic turbulence are studied using direct numerical simulations (DNS), as well as Langevin simulations (LS) based on a probability density function (PDF) kinetic model… read more here.
Keywords: pair; isotropic turbulence; time; particle ... See more keywords
Turbulence in a box: quantification of large-scale resolution effects in isotropic turbulence free decay
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2017.158
Abstract: The effects of the finiteness of the physical domain over the free decay of homogeneous isotropic turbulence are explored in the present article. Saturation at the large scales is investigated by the use of theoretical… read more here.
Keywords: large scale; turbulence box; isotropic turbulence; free decay ... See more keywords
Closure model for homogeneous isotropic turbulence in the Lagrangian specification of the flow field
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2018.98
Abstract: This paper proposes a new two-point closure model that is compatible with the Kolmogorov $-5/3$ power law for homogeneous isotropic turbulence in an incompressible fluid using the Lagrangian specification of the flow field. A closed… read more here.
Keywords: specification flow; isotropic turbulence; closure model; lagrangian specification ... See more keywords
Collision-induced breakage of agglomerates in homogenous isotropic turbulence laden with adhesive particles
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2020.582
Abstract: Abstract We carry out direct numerical simulation combined with adhesive discrete element calculations to investigate collision-induced breakage of agglomerates in homogeneous isotropic turbulence. The adopted method tracks the dynamics of individual particles while they are… read more here.
Keywords: isotropic turbulence; breakage agglomerates; breakage; induced breakage ... See more keywords
Acceleration statistics of tracer and light particles in compressible homogeneous isotropic turbulence
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2022.35
Abstract: Abstract The accelerations of tracer and light particles (bubbles) in compressible homogeneous isotropic turbulence are investigated by using data from direct numerical simulations up to turbulent Mach number $M_t =1$. For tracer particles, the flatness… read more here.
Keywords: tracer light; compressible homogeneous; acceleration; isotropic turbulence ... See more keywords
Geometry of two-point velocity correlation tensor of homogeneous isotropic turbulence with helicity in sol-manifold coordinates
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Mathematical Physics"
DOI: 10.1063/1.5048802
Abstract: In this paper, a geometric model of homogeneous isotropic turbulence with helicity in three dimensions using a family of the quadratic forms of Riemannian metrics generated by the two-point correlation tensor field is investigated. We… read more here.
Keywords: isotropic turbulence; turbulence helicity; correlation tensor; geometry ... See more keywords
A new linear forcing method for isotropic turbulence with controlled integral length scale
Sign Up to like & getrecommendations! Published in 2021 at "Physics of Fluids"
DOI: 10.1063/5.0045818
Abstract: Turbulence is a common feature to all flows that surround us. Despite its ubiquity, particularly in industrial flows, it is very difficult to provide a mathematical framework for the generation of turbulent eddies. Several methods… read more here.
Keywords: length scale; isotropic turbulence; turbulence; integral length ... See more keywords
Prandtl number effects in decaying homogeneous isotropic turbulence with a mean scalar gradient
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Turbulence"
DOI: 10.1080/14685248.2017.1294253
Abstract: ABSTRACT Decaying homogeneous isotropic turbulence with an imposed mean scalar gradient is investigated numerically, thanks to a specific eddy-damped quasi-normal Markovian closure developed recently for passive scalar mixing in homogeneous anisotropic turbulence (BGC). The present… read more here.
Keywords: isotropic turbulence; turbulence; number; prandtl number ... See more keywords