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本文针对新型旋流静态微泡浮选柱,利用ANSYS Fluent商业软件,基于欧拉-欧拉双流体模型,系统地模拟了汽泡直径对该浮选柱不同流段内的流体动力学行为的影响规律。气液间相间作用力采用Tomiyama曳力模型并忽略升力、壁面润滑力、湍流耗散力、虚拟质量力和浮力。湍流采用Realizable k-ε双方程模型。研究发现,气泡直径对气含率、湍动能及其耗散率、速度大小以及气泡竖直方向的速度分量均产生显著影响。随着气泡直径的减小,气含量和气液界面面积均增大,湍动能及其耗散率先增大后减小,气泡在柱内的停留时间增加。研究结果对该浮选柱的设计、优化具有指导意义。
In this paper, a new type of swirling static microbubble flotation column was used. Based on the Euler-Euler dual-fluid model, ANSYS Fluent commercial software was used to systematically simulate the hydrodynamic behavior of bubble diameter in different flow regimes of the flotation column Affect the law. The intermolecular forces between gas and liquid adopt the Tomiyama drag model and neglect the lift force, wall lubrication force, turbulence dissipation force, virtual mass force and buoyancy. Turbulence using Realizable k-ε two-equation model. The results show that the bubble diameter has a significant effect on gas holdup, turbulent kinetic energy and its rate of dissipation, velocity and velocity components in the vertical direction of bubbles. As the bubble diameter decreases, the gas content and gas-liquid interface area increase, the turbulent kinetic energy and its dissipation rate first increase and then decrease, and the residence time of bubbles in the column increases. The results of the research on the flotation column design, optimization is instructive.