| 浆料系统内上升气泡周围微细颗粒浓度分布和附着效率的理论研究 |
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| 引用本文： | 蔡旺锋,许春建,周明. 浆料系统内上升气泡周围微细颗粒浓度分布和附着效率的理论研究[J]. 中国化学工程学报, 2002, 10(5): 550-557 |
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| 作者姓名： | 蔡旺锋 许春建 周明 |
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| 作者单位： | ChemicalEngineeringResearchCenter,TianjinUniversity,Tianjin300072,China |
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| 摘 要： | Quantitative prediction of distribution function and adhesion efficiency of particles around a rising bubble in slurry systems is presented in this work. By solving the convection-diffusion equation (Fokker-Planck equation), the influence of Brownian diffusivity of fine particles on concentration distribution and adhesion efficiency is demonstrated with the hydrodynamic force and van der Waals attractive potential between particles and bubble considered. It is found that two kinds of mechanism dominate the adhesion process of particles on bubble according to different Peclet number or size of particles and bubble, as well as other properties of the slurry systems. In addition, the viscosity ratio of bubble to the suspending fluid was found to have obvious influence on particle adhesion.
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| 关 键 词： | 浆料系统 上升气泡 微细颗粒 浓度分布 附着效率 理论研究 气液传质 蒸馏 |
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Theoretical Approach to Concentration Distribution and Adhesion Efficiency of Fine Particles Around a Rising Bubble in Slurry Systems |
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| CAI Wangfeng,XU Chunjian,ZHOU Ming. Theoretical Approach to Concentration Distribution and Adhesion Efficiency of Fine Particles Around a Rising Bubble in Slurry Systems[J]. Chinese Journal of Chemical Engineering, 2002, 10(5): 550-557 |
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| Authors: | CAI Wangfeng XU Chunjian ZHOU Ming |
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| Affiliation: | Chemical Engineering Research Center, Tianjin University, Tianjin 300072, China |
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| Abstract: | Quantitative prediction of distribution function and adhesion efficiency of particles |
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| Keywords: | adhesion efficiency Brownian diffusivity distribution function Fokker-Planck equation |
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