This article presents the results of hydrodynamics and mass exchange in a stirred tank upon introduction gas from an open vortex cavity into local liquid regions with reduced pressure. It establishes conditions for intensive dispersion gas. Velocity fields pressure behind stirrer paddles are determined by numerical simulation OpenFOAM. The content value, bubble diameters, phase surface experime...

We propose a new experimental protocol to investigate the atmospheric dispersion of dense gas in wind-tunnel experiments. Simultaneous measurements concentration and velocity are performed by coupling flame ionisation detector (FID) hot-wire anemometer (HWA), whose probes located sufficiently close each other so that respective correspond same sampling volume. The heavy emission consists mixtur...

Abstract This paper assesses the prediction of inert tracer gas dispersion within a cavity height ( H ) 1.0 m, and unity aspect ratio, using large Eddy simulation (LES). The flow Reynolds number was 67 000, based on freestream velocity height. upstream laminar, producing shear layer which underwent transition to turbulence over cavity. Three distinct meshes are used, with grid spacings <?CDATA ...