| 搅拌槽内液-固两相体系的数值研究(Ⅱ)临界搅拌转速的预测 |
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| 引用本文： | 王峰,毛在砂,沈湘黔. 搅拌槽内液-固两相体系的数值研究(Ⅱ)临界搅拌转速的预测[J]. 中国化学工程学报, 2004, 12(5): 610-614 |
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| 作者姓名： | 王峰 毛在砂 沈湘黔 |
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| 作者单位： | [1]InstituteofProcessEngineering,ChineseAcademyofSciences,Beijing100080,China [3]ChangshaResearchInstituteofMiningandMetallurgy,Changsha410012,China |
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| 摘 要： | The critical impeller speed, NJS, for complete suspension of solid particles in the agitated solid-liquid two-phase system in baffled stirred tanks with a standard Rushton impeller is predicted using the computational procedure proposed in Part Ⅰ. Three different numerical criteria are tested for determining the critical solid suspension. The predicted NJS is compared with those obtained from several empirical correlations. It is suggested the most reasonable criterion for determining the complete suspension of solid particles is the positive sign of simulated axial velocity of solid phase at the location where the solid particles are most difficult to be suspended.
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| 关 键 词： | 搅拌槽 搅拌转速 数值研究 两相体系 临界 |
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Numerical Study of Solid-Liquid Two-Phase Flow in Stirred Tanks with Rushton Impeller (II) Prediction of Critical Impeller Speed |
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| WANG Feng,MAO Zaisha,SHEN Xiangqian. Numerical Study of Solid-Liquid Two-Phase Flow in Stirred Tanks with Rushton Impeller (II) Prediction of Critical Impeller Speed[J]. Chinese Journal of Chemical Engineering, 2004, 12(5): 610-614 |
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| Authors: | WANG Feng MAO Zaisha SHEN Xiangqian |
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| Affiliation: | Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China;Graduate School of the Chinese Academy of Sciences, Beijing 100039, China;Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China;Changsha Research Institute of Mining and Metallurgy, Changsha 410012, China |
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| Abstract: | The critical impeller speed, NJs, for complete suspension of solid particles in the agitated solid-liquid two-phase system in baffled stirred tanks with a standard Rushton impeller is predicted using the computational procedure proposed in Part I. Three different numerical criteria are tested for determining the critical solid suspension. The predicted NJS is compared with those obtained from several empirical correlations. It is suggested the most reasonable criterion for determining the complete suspension of solid particles is the positive sign of simulated axial velocity of solid phase at the location where the solid particles are most difficult to be suspended. |
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| Keywords: | stirred tank solid-liquid flow critical impeller speed solid suspension numerical simulation |
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