【摘要】 使用计算流体力学CFD软件CFX5.5.1对搅拌槽内固液流场进行了数值模拟。搅拌槽直径T=476mm,槽内均布四块挡板,搅拌桨为CBYⅢ桨。两相物系采用玻璃珠水体系,固体体积分数Фv为5.4%。文中使用标准κε模型计算了清水与固液两相的流场,考察了槽内的流场的分布对固体颗粒悬浮状况的影响,同时把槽底的清水和Ф为5.4%的固液两相模拟结果与实验结果进行了对比,模拟结果与实验较吻合。更多还原

【Abstract】 For the scale-up of solid-liquid stirred tanks, it is important to study the velocity distribution for both liquid and solid in a stirred tank. In this paper the liquid velocity in solid-liquid stirred tanks was predicated using Computational Fluid Dynamics(CFD) and validated by the experimental data obtained from the literature. The predication was carried out in a fully baffled, flat bottom vessel, with 476 mm diameter, equipped with CBYIII impeller. The multiphase flow was modeled using the κ-ε model. The CFD predication of the velocity distribution in the bottom of the stirred tank is in good agreement with the experimental data.更多还原