Numerical simulation of gas holdup distribution in a standard Rushton stirred tank using discrete particle method

Abstract

Abstract: The discrete particle method was used to simulate the distribution of gas holdup in a gas-liquid standard Rushton stirred tank. The gas phase was treated as a large number of bubbles and their trajectories were tracked with the results of motion equations. The two-way approach was performed to couple the interphase momentum exchange. The turbulent dispersion of bubbles with a size distribution was modeled using a stochastic tracking model, and the added mass force was involved to account for the effect of bubble acceleration on the surrounding fluid. The predicted gas holdup distribution showed that this method could give reasonable prediction comparable to the reported experimental data when the effect of turbulence was took into account in modification for drag coefficient.

Key words: numerical simulation, gas holdup, stirred tank, discrete particle

摘要： The discrete particle method was used to simulate the distribution of gas holdup in a gas-liquid standard Rushton stirred tank. The gas phase was treated as a large number of bubbles and their trajectories were tracked with the results of motion equations. The two-way approach was performed to couple the interphase momentum exchange. The turbulent dispersion of bubbles with a size distribution was modeled using a stochastic tracking model, and the added mass force was involved to account for the effect of bubble acceleration on the surrounding fluid. The predicted gas holdup distribution showed that this method could give reasonable prediction comparable to the reported experimental data when the effect of turbulence was took into account in modification for drag coefficient.

关键词: numerical simulation;gas holdup;stirred tank;discrete particle

HAN Luchang, LIU Yuejin, LUO He'an. Numerical simulation of gas holdup distribution in a standard Rushton stirred tank using discrete particle method[J]. .

韩路长, 刘跃进, 罗和安. 基于离散颗粒法模拟搅拌釜气含率分布[J]. CIESC Journal.

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