http://swrc.ontoware.org/ontology#Article
2段パドル翼をもつ撹拌槽内の粒子分散挙動に対する循環流の効果
ja
Non-Newtonian fluid
Flow simulation
Shear-thinning fluid
Solid-Liquid mixing
Circulate flow
相澤 栄次
津田 武明
阪野 伸大
今駒 博信
大村 直人
Aizawa Eiji
Tsuda Takeaki
Sakano Nobuhiro
Imakoma Hironobu
Ohmura Naoto
金沢大学先端科学・社会共創推進機構
粉体工学会誌
47
5
317-326
2010-05-10
0386-6157
1883-7239
AN00222757
粉体工学会 The Society of Powder Technology, Japan
Particle dispersion in a stirred vessel with dual paddle impellers was numerically investigated by a commercial CFD code. The working fluid was assumed a weak shear-thinning non-Newtonian fluid or Newtonian fluid having low viscosity (ca. 4.0 Pa · s). Particles were initially set in the lower half region in the vessel. Numerical simulations were conducted by varying rheological property, location of the impellers and discharge flow rate of impellers. Numerical results showed that the viscosity was lower near the impeller in the non-Newtonian fluid than in the Newtonian fluid due to strong shear near the forefront of impeller. Consequently, the velocity of discharge flow from impeller was larger in the non-Newtonian. Larger velocity of the discharge flow took more particles to the tank wall as compared with Newtonian fluid. The present work adopted the mean value and the standard deviation of particle concentration as particle dispersion indexes. It has been found that the standard deviation depends on particle dispersion process.
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