Instantaneous transport of a passive scalar in a turbulent separated flow
Sign Up to like & getrecommendations! Published in 2017 at "Environmental Fluid Mechanics"
DOI: 10.1007/s10652-017-9567-3
Abstract: The results of large-eddy simulations of flow and transient solute transport over a backward facing step and through a 180° bend are presented. The simulations are validated successfully in terms of hydrodynamics and tracer transport… read more here.
Keywords: transport passive; transport; hydrodynamics; passive scalar ... See more keywords
Modeling of a passive scalar transport from thermal power plants to atmospheric boundary layer
Sign Up to like & getrecommendations! Published in 2019 at "International Journal of Environmental Science and Technology"
DOI: 10.1007/s13762-019-02273-y
Abstract: At the moment, there is a tendency to increasing the number of thermal power plants (TPPs); this trend can be associated with industrial development and energy consumption growth. This paper discusses the numerical simulation of… read more here.
Keywords: power plants; thermal power; pollution; modeling passive ... See more keywords
Passive scalar diffusion in the near field region of turbulent rectangular submerged free jets
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Heat and Mass Transfer"
DOI: 10.1016/j.ijheatmasstransfer.2017.05.038
Abstract: Jets are a common way to transfer mass among fluids, or from a fluid to a surface. At moderate Reynolds numbers and low turbulent intensities the jet exhibits a Near Field Region (NFR) several diameters… read more here.
Keywords: scalar diffusion; near field; passive scalar; region ... See more keywords
Ergodicity and invariant measures for a diffusing passive scalar advected by a random channel shear flow and the connection between the Kraichnan-Majda model and Taylor-Aris Dispersion
Sign Up to like & getrecommendations! Published in 2021 at "Physica D: Nonlinear Phenomena"
DOI: 10.1016/j.physd.2021.133118
Abstract: We study the long time behavior of an advection-diffusion equation with a random shear flow which depends on a stationary Ornstein-Uhlenbeck (OU) process in parallel-plate channels enforcing the no-flux boundary conditions. We derive a closed… read more here.
Keywords: time; shear flow; passive scalar; diffusion ... See more keywords
Péclet-number dependence of small-scale anisotropy of passive scalar fluctuations under a uniform mean gradient in isotropic turbulence
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2020.419
Abstract: We study passive scalar fluctuations convected by statistically stationary homogeneous isotropic turbulence under a uniform mean scalar gradient. In order to elucidate the parameter dependence of small-scale statistics of scalar fluctuations, we conduct direct numerical… read more here.
Keywords: clet number; passive scalar; number; unicode stix ... See more keywords
Contribution of direct numerical simulations to the budget and modelling of the transport equations for passive scalar turbulent fields with wall scalar fluctuations
Sign Up to like & getrecommendations! Published in 2023 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2023.324
Abstract: Abstract We perform direct numerical simulations (DNS) of the fully developed turbulent channel flow with a passive scalar subjected to constant time-averaged scalar fluxes at the wall. The first case (case I) considers a constant… read more here.
Keywords: turbulent; passive scalar; wall scalar; scalar fluctuations ... See more keywords
The dynamics of concentration fluctuations within passive scalar plumes in a turbulent neutral boundary layer
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2024.861
Abstract: Abstract We investigate the concentration fluctuations of passive scalar plumes emitted from small, localised (point-like) steady sources in a neutrally stratified turbulent boundary layer over a rough wall. The study utilises high-resolution large-eddy simulations for… read more here.
Keywords: concentration fluctuations; boundary layer; concentration; scalar plumes ... See more keywords
Passive scalar statistics in a turbulent round jet: symmetry theory and direct numerical simulation
Sign Up to like & getrecommendations! Published in 2025 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2025.10236
Abstract: Abstract We analyse moment and probability density function (PDF) statistics of a passive scalar $\Theta$ at a Prandtl number of $Pr=0.71$ in a turbulent jet. For this, we conducted a direct numerical simulation at a… read more here.
Keywords: direct numerical; jet; scalar statistics; symmetry theory ... See more keywords
Experimental investigation of fractal features of passive scalar mixing in turbulent pipe flow
Sign Up to like & getrecommendations! Published in 2025 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2025.10454
Abstract: Abstract In this study, we present a fractal dimension analysis of high Schmidt number passive scalar mixing in experiments of turbulent pipe flow. By using the high-resolution planar laser-induced fluorescence technique, the scalar concentration fields… read more here.
Keywords: pipe flow; fractal dimension; turbulent pipe; passive scalar ... See more keywords
Fluid dynamics and passive scalar transport driven by non-uniform tumbling of a prolate spheroid in simple shear flow
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2025.10689
Abstract: Abstract Using high-fidelity numerical simulations based on a lattice Boltzmann framework, the advection-enhanced transport of a passive scalar from a prolate spheroid in simple shear flow has been thoroughly investigated across various parameters, including the… read more here.
Keywords: transport; scalar transport; spheroid; fluid ... See more keywords
Absorption of a passive scalar by a random sphere pack beneath a turbulent channel flow
Sign Up to like & getrecommendations! Published in 2025 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2025.10899
Abstract: Abstract Using pore-resolved direct numerical simulation (DNS), we investigate passive scalar transport at a unit Schmidt number in a turbulent flow over a randomly packed bed of spheres. The scalar is introduced at the domain’s… read more here.
Keywords: value; sphere pack; reynolds numbers; absorption ... See more keywords