A numerical method for gas-solid two-phase free turbulent flow using a vortex method

This paper presents a numerical method for gas-solid two-phase free turbulent flow. The computation of the gas flow by a vortex method and the Lagrangian calculation of the particle motion are simultaneously performed, in which the change in the vorticity for the gas-phase by the interaction between the two phases is taken into account. The change due to the force exerted by the particle on the gas-phase is evaluated by an area weighting method, while the change by the viscous effect is simulated through a core spreading method. The present numerical method is also applied to calculate a two-dimensional gas-solid two-phase mixing layer to confirm the applicability. The numerical results, such as the number density, velocity and turbulent intensity of the particle, are favorably compared with the experimental data. (C) 2001 Elsevier Science B.V. All rights reserved.