Web2 Jun 2004 · Paper reviews recent laboratory and numerical model studies of passive gaseous tracer dispersion in the atmospheric convective boundary layer (CBL) with … WebIn a related study, Giusti et al. (Reference Giusti, Worth, Mastorakos and Dowling 2024) found that, for low frequencies, a model accounting for shear layer dispersion correctly describes the decrease of the passive scalar TF with increasing frequency. For higher frequencies, however, their model overestimates the empirical TF.
Modeling passive scalar dispersion in the atmospheric …
Web1 Oct 2003 · Integral models typically consider dense gas clouds by analyzing them in terms of a number of regimes; after initial momentum-dominated and buoyancy-dominated phases, a cloud is usually assumed to be passive; some models ensure a smooth transition from one regime to the next. Web1 Jul 2010 · When modelling the turbulent dispersion of a passive tracer using Reynolds-averaged Navier–Stokes (RANS) simulations, two different approaches can be used. The first consists of solving a transport equation for a scalar, where the governing parameters are the mean velocity field and the turbulent diffusion coefficient, given by the ratio of the … bits for horses list
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Web30 Jun 2015 · By means of finescale modeling [large-eddy simulation (LES)], the combined effect of thermal and mechanical forcing on the dispersion of a plume in a convective boundary layer is investigated. Dispersion of a passive tracer is studied in various atmospheric turbulent flows, from pure convective to almost neutral, classified according … Web24 Mar 2024 · The influence of the different scales of turbulent motion on plume dispersion in the atmospheric convective boundary layer (CBL) is studied by means of a large-eddy simulation (LES). WebThe UDM models the dispersion following a ground-level or elevated two-phase pressurised release. It effectively consists of the following linked modules (see Figure 1 and Figure 8): • jet dispersion • droplet evaporation and rainout, touchdown • pool spread and vaporisation • heavy gas dispersion • passive dispersion bits for horses with large tongues