https://scholars.lib.ntu.edu.tw/handle/123456789/598240
標題: | Representative shear rate for particle agglomeration in a mixing tank | 作者: | Ochi Y Cai Z Horie T Komoda Y Tung K.-L Ohmura N. KUO-LUN TUNG |
關鍵字: | Mixing tank;Particle agglomeration;Population balance equation;Shear flow;Impellers;Mixing;Particle size;Shear deformation;Sodium chloride;Tanks (containers);Bimodal particle size distribution;Experimental conditions;Individual particles;Orthokinetic agglomeration;Particle agglomerations;Polystyrene particle;Rushton turbines;Agglomeration | 公開日期: | 2021 | 卷: | 171 | 起(迄)頁: | 73-79 | 來源出版物: | Chemical Engineering Research and Design | 摘要: | Polystyrene particles were dispersed in glycerol solution containing sodium chloride. The orthokinetic agglomeration process of the particles was observed in a mixing tank agitated by a six-blade Rushton turbine. It is found that the median diameter of agglomerates was initially increased and asymptotically approached a constant value. Bimodal particle size distributions were obtained within all of the experimental conditions and the stable size of produced agglomerates was independent of the rotational speed of the impeller. On the other hand, the amount of produced agglomerates was increased as the increase in the rotational speed of the impeller. Considering the experimental results, the population balance equation of a mathematical model to describe the evolution of the agglomerates was simplified. Then a representative shear rate taking into account the shear history of individual particles was proposed and its applicability was evaluated. It is showed that this shear rate is useful to predict agglomeration behavior of particles and a conventional representative shear rate in a mixing tank is overestimation. ? 2021 Institution of Chemical Engineers |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85106323352&doi=10.1016%2fj.cherd.2021.04.017&partnerID=40&md5=67464b47cb774cd1c4e478b8b72b5bbd https://scholars.lib.ntu.edu.tw/handle/123456789/598240 |
ISSN: | 02638762 | DOI: | 10.1016/j.cherd.2021.04.017 |
顯示於: | 化學工程學系 |
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