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
Intermittency and Passive Scalar Nature of Electron Density Fluctuations in the High‐Latitude Ionosphere at Swarm Altitude
Sign Up to like & getrecommendations! Published in 2020 at "Geophysical Research Letters"
DOI: 10.1029/2020gl089628
Abstract: Some physical processes due to Sun‐Earth interaction can influence the configuration and the dynamics of the high‐latitude ionospheric plasma, particularly during geomagnetically disturbed periods. A possible consequence of this interaction is the occurrence of turbulent… read more here.
Keywords: density; electron density; density fluctuations; passive scalar ... See more keywords
A differential approximation model for passive scalar turbulence
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Physics A: Mathematical and Theoretical"
DOI: 10.1088/1751-8121/ac1484
Abstract: Two-dimensional passive scalar turbulence is studied by means of a k-space diffusion model based on a third order differential approximation. This simple description of local nonlinear interactions in Fourier space is shown to provide a… read more here.
Keywords: differential approximation; energy; turbulence; passive scalar ... See more keywords
Scaling laws of passive-scalar diffusion in the interstellar medium
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stx261
Abstract: Passive-scalar mixing (metals, molecules, etc.) in the turbulent interstellar medium (ISM) is critical for abundance patterns of stars and clusters, galaxy and star formation, and cooling from the circumgalactic medium. However, the fundamental scaling laws… read more here.
Keywords: laws passive; interstellar medium; diffusion; passive scalar ... See more keywords
Passive scalar transport by a non-Gaussian turbulent flow in the Batchelor regime.
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review E"
DOI: 10.1103/physreve.96.013117
Abstract: We analyze passive scalar advection by a turbulent flow in the Batchelor regime. No restrictions on the velocity statistics of the flow are assumed. The properties of the scalar are derived from the statistical properties… read more here.
Keywords: turbulent flow; batchelor regime; flow batchelor; passive scalar ... See more keywords
Perspectives on scaling and multiscaling in passive scalar turbulence.
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review E"
DOI: 10.1103/physreve.97.052124
Abstract: We revisit the well-known problem of multiscaling in substances passively advected by homogeneous and isotropic turbulent flows or passive scalar turbulence. To that end we propose a two-parameter continuum hydrodynamic model for an advected substance… read more here.
Keywords: scaling multiscaling; turbulence; passive scalar; multiscaling passive ... See more keywords