Abstract
This article describes a numerical method of combining an overtopped grid technique with a recently developed two-fluid model for two-phase flow simulations. The combination of these two approaches provides a useful tool for numerical modeling of complex two-phase flows with irregular geometries. The turbulent gas-particle two-phase flow over a backward-facing step is considered to demonstrate the applicability and accuracy of the proposed method. The predictions show good agreement with experimental data, much better than the previously reported numerical solutions. The flexibility of the present numerical method is also demonstrated by simulating the two-phase flow in a T-junction channel The importance of this study is expected to be more apparent in dealing with three-dimensional and multiple-phase flow problems, where efficient numerical techniques and algorithms, such as multigrid methods and parallel computing on multiprocessor parallel computers, can be easily adapted to get a solution of complex flow problems within a reasonable computer time.
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