期刊论文详细信息
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
COLLISION EFFICIENCY AND COLLOIDAL STABILITY OF UNEQUAL SIZE SPHERICAL PARTICLES MOVING THROUGH QUIESCENT VISCOUS LIQUID
SHINICHI YUU1  HIROSHI MIHARA1  FUYUHIKO NAKAGAWA1  YOSHIHIRO FUKUI1 
[1] Laboratory of Powder Mechanics, Kyushu Institute of Technology
关键词: Sedimentation;    Solid Liquid Separation;    Filtration;    Colloidal Stability;    Fluid Mechanics;    Dust Collection;   
DOI  :  10.1252/jcej.20.518
来源: Maruzen Company Ltd
PDF
【 摘 要 】

References(13)Cited-By(1)Collision efficiencies have been computed for unequal-size spherical particles settling in quiescent viscous liquids, taking into account the hydrodynamic interaction, interparticle attraction and electrostatic repulsion. The results are closely related to the mechanism of coagulation of colloidal particles in a sedimentation field. If the interparticle attraction and electrostatic repulsion are both negligibly small as compared to viscous drag, the collision efficiency η is very small, i.e. about 0.003. However, a relatively large Van der Waals force makes η greater than unity. As the ratio of the radii of the two particles (smaller divided by larger) decreases the collision efficiency also decreases. The repulsive force between particles determines whether the collision efficiency is zero or larger than zero, but it does not affect the magnitude of the collision efficiency. By including the effect of electrostatic repulsion we were able to develop criteria which determine the stability (or flocculation) of colloidal particles.

【 授权许可】

Unknown   

【 预 览 】
附件列表
Files Size Format View
RO201912080692823ZK.pdf 578KB PDF download
  文献评价指标  
  下载次数:11次 浏览次数:19次