A computational procedure is presented with a multigrid-acceleration scheme for an efficient modeling of turbulent recirculating and highly curved two-phase flows in general coordinates. The two-phase flows consist of a fluid phase governed by Eulerian equations and a particle phase governed by Lagrangian equations. The fluid turbulence-induced particle dispersion is simulated with an eddy-interaction model. Numerical results are presented and compared with available experimental measurements for a particle-laden liquid flow in a sudden-expansion pipe and a particle-laden gaseous flow in a 90 degrees bend. The multigrid computational efficiency is assessed against the conventional single-grid iteration. Results show that the multigrid method substantially enhances the computational efficiency on the fine grids as compared to the single-grid method. In addition, numerical predictions agree favorably with experimental measurements. [References: 19]
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