Simulation of dispersion of heavy particles in confined turbulent flows

Abstract

The turbulent dispersion of particles is of major importance in such diverse applications as liquid fuel and coal combustion, reaction quenching in (for example) petroleum chemistry, sediment transport in rivers and gas-solid separation in cyclones. In recent years there has been increased emphasis on the development of mathematical models to predict the behavior of particles and/or droplets in turbulent flows and these can be grouped under the two Page 490 May, 1984 AlChE Journal (Vol. 30, No. 3) NOTATION U~. U Z , U~ CI,Cz,C, = coefficients in Eq. 6 = constants in the turbulence model CD = drag coefficient Dp = particle diameter k = kinetic energy Re = pDp I upu I / p , relative Reynolds number

Turbulence closure modeling of the dilute gas‐particle axisymmetric jet

“…Thus the two-way coupling between the phases described above is not accounted for. Recent applications using this approach are those of Shuen et al (1983) and Weber et al (1984). A recent Lagrangian approach that does take account of the particles' effect on the fluid turbulence is that of Gosman and Ioannides (1981).…”

Jet flames of a refuse derived fuel

“…These have been obtained by performing CFD simulations of trajectories of individual coal particles and by subsequent averaging the obtained residence times over a large number of particles. The flow turbulence was taken into account using the particle tracking procedure developed at the beginning of eighties at the University of Sheffield [16,17] which was later on implemented into the CFD Fluent code. Thus, the residence time figures shown in Fig.…”

Hydrodynamics of the Low-Energy Separator

“…Hydrodynamics of the dispersed phase are carried out by a Lagrangian approach which has a quasi-analytical solution, as shown in Table 3 ( Boysan and Ayers, 1982;Weber et al, 1984).…”