• 关键词：絮凝  Fluent  湍动动能  有效能耗  Taylor-Couette流

• 基金项目：国家自然科学基金(No.50878102)

• 韩晓婷
• 兰州交通大学环境与市政工程学院, 兰州 730070

• 常青
• 兰州交通大学环境与市政工程学院, 兰州 730070

• 毛玉红
• 兰州交通大学环境与市政工程学院, 兰州 730070

• 曾立云
• 兰州交通大学环境与市政工程学院, 兰州 730070

• 摘要：通过流体力学中的Fluent软件模拟了Taylor-Couette 反应器的速度矢量分布、湍动动能分布和有效能耗分布,同时实验研究了Taylor-Couette 反应器不同内筒转速下三氯化铁对高岭土悬浊液的絮凝效能.结果表明,内外筒环隙间存在亚微尺度的涡旋,当转速为30~60 r·min^-1时,涡旋形状闭合完整,相互分离,涡旋内部速度梯度较小,湍动动能k在0.00010~0.00023 m²·s^-2的范围内,有效能耗ε在0.00057~0.00189 m²·s^-3的范围内,絮凝效能达到最大(80%以上),湍动动能和有效能耗过大或过小均不利于形成完整闭合的涡旋,絮凝效能较差.

• Abstract：Based on Fluent technology, the numerical simulation of Taylor-Couette flow was performed, and the flocculation efficiencies were also obtained in the same Taylor-Couette flow at the different inner cylinder rotational speeds. The results indicated that the vortices of submicroscopic size were formed in the annulus gap as shown in the velocity vector map, and the velocity gradient inside the vortices was lower than outside vortices. When the inner cylinder speeds changed from 30 r·min^-1 to 60 r·min^-1, the flocculation efficiencies reached the maximum values (above 80%), the turbulent kinetic energy was in the range of 0.00010~0.00023 m²·s^-2, and the available energy dissipation rate was in the range of 0.00057~0.00189 m²·s^-3. Excessively high or low turbulent kinetic energy and available energy dissipation rate were not favorable for the formation of integrated and closed vortices, leading to lower. flocculation efficiencies.

• Key words：flocculation  Fluent  turbulent kinetic energy  vailable energy dissipation rate  Taylor-Couette flow

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