搅拌槽内流体力学特性的数值模拟研究

Numerical simulation of hydraulic characteristics in a stirred tank

采用FLUENT6.3.26软件求解气液两相流,自由液面的捕捉采用VOF(volume of fluid)法,辅以标准k-ε湍流模型数值求解气液两相流时均方程,使用了半隐式SIMPLE(Semi-Implicit Method for Pressure-Linked Equations)算法求解速度与压力耦合方程组,旨在研究搅拌槽在搅拌过程中流体流动的力学特性,分析比较了不同水深处的水流沿半径方向的径向速度、切向速度及轴向速度的规律,经过研究和分析发现模拟的速度值与实验值吻合良好,为搅拌槽的设计和运行提供了参考。

The paper used FLUENT6.3.26 to solve gas - liquid two - phase flow. The VOF （ Volume of fluid） method was applied to track free surface. The gas - liquid two - phase time - averaged equation was numerically solved with standard k - ε turbulence model. The coupling velocity and pressure equation was solved with SIMPLE （Semi -Implicit Method for Pressure -Linked Equations）algorithm so as to study the mechanical properties of fluid flow in stirred tank during the mixing process, and compare the law of radial, tangential, and axial velocities along radius of water flow at different water depths. Result showed that the speed values of simulated and measured are in good agreement which can provide a reference for the design and operation of stirred tank.