Mixing, transport and combustion in sprays

A model of gas-particle turbulent pipe flow which takes into account phase velocity slip, particle interaction with the wall and rotation of the particles is proposed. Allowance for the Magnus force makes it possible to describe the intense transverse “skipping” motion of the particles and to obtain good agreement between the calculation results and the experimental data over a broad range of flow conditions. The model is based on the use of the transport equations for the averaged flow parameters and the correlation moments describing the turbulent transfer of the momentum and angular momentum of the dispersed phase.

Investigation of gas-particle turbulent pipe flow with allowance for collisions with the wall and particle rotation

Numerical calculations have been carried out for gas-particle confined turbulent flows using a recently developed two-phase turbulence closure model. The present modeling scheme utilizes Eulerian formulations of the transport equations and accounts for the combined effects of interphase slip and turbulent dispersion of particles. A multiple-scale turbulence model is used for the turbulent field modeling of the underlying fluid flow. For the particle size and particle loading considered in this study, the fluid turbulence transport equations must be modified to include the damping effects of particles. Predictions and comparisons are made in the fully developed gas-solid pipe flow and the confined particle-laden jet. Numerical results are in reasonably good agreement with the published experimental information.

C. P. Chen

Papers

Calculation of confined gas-particle two-phase turbulent flows