Hydrodynamics of a Dual Shaft Mixer with Newtonian and Non-Newtonian Fluids
Hydrodynamics of a Dual Shaft Mixer with Newtonian and Non-Newtonian Fluids
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DOI：
10.1205/cherd06158
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发表时间：
2007
影响因子：
3.9
通讯作者：
A. Khopkar;L. Fradette;P. Tanguy
中科院分区：
文献类型：
--
作者：
A. Khopkar;L. Fradette;P. Tanguy
研究了由安装在中心轴上的Paravisc叶轮和偏心转子-定子组成的多轴搅拌容器在层流状态下的流体力学性能。功率消耗和混合时间分别用扭矩测量和变色法测定。研究发现，在转子-定子泵送能力差的情况下，转子-定子对Paravisc涡轮的功率消耗没有影响。研究了混合过程的整体过程和转子-定子对混合过程的影响。结果表明，转子-定子结构不仅能使混合提前开始，而且能提高混合速率。为了确保最佳的混合效率，本研究强调，Paravisc需要以这样一种方式运行，即Paravisc功率消耗对总功率消耗的贡献占主导地位。
The hydrodynamic performance of a multi-shaft stirred vessel comprising a Paravisc impeller mounted on central shaft and an off-centred rotor-stator was investigated in the laminar regime with Newtonian and non-Newtonian fluids. The power consumption and the mixing time were determined using torque measurements and a discolouration method, respectively. It was found that the rotor-stator did not influence the power consumption of the Paravisc turbine in relation the poor pumping capacity of the rotor-stator. The overall mixing process and the influence of rotor-stator on the mixing process were investigated. It was found that the rotor-stator not only initiates the mixing early but also improves rate of mixing. To ensure the best mixing efficiency, the present study highlights that the Paravisc needs to be operated in such a way that the contribution of the Paravisc power draw on the overall power consumption is predominant.