Chin. J. Chem. Eng.

An improved level set approach for computing the incompressible two-phase flow with significantly deformed free interface is presented. The control volume formulation with the semi-implicit method for pressure-linked equations consistent (SIMPLE C) algorithm incorporated is used to solve the governing equations on a staggered grid. Several improvements concerning the computational grid, interface update, reinitialization procedure etc, are tested and found to be effective in promoting the convergence and numerical stability. The motion of a bubble or drop in a liquid with large density ratio, viscosity ratio and surface tension is numerically simulated. The computational results are in good agreement with the reported experimental data.An improved level set approach for computing the incompressible two-phase flow with significantly deformed free interface is presented. The control volume formulation with the semi-implicit method for pressure-linked equations consistent (SIMPLE C) algorithm incorporated is used to solve the governing equations on a staggered grid. Several improvements concerning the computational grid, interface update, reinitialization procedure etc, are tested and found to be effective in promoting the convergence and numerical stability. The motion of a bubble or drop in a liquid with large density ratio, viscosity ratio and surface tension is numerically simulated. The computational results are in good agreement with the reported experimental data