Controlling the size of fragrance microcapsules using designed agitator paddles: Experiment and CFD simulation  

作　　者：Hongbin Zhao Xuening Fei Baolian Zhang Shuxing Zhao Guangmin Li Lingyun Cao 

机构地区：[1]School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China [2]School of Science, Tianjin Chengjian University, Tianjin 300384, China [3]School of Materials Science and Engineering, Tianjin Chengjian University, Tianjin 300384, China [4]School of Energy and Safety Engineering, Tianjin Chengjian University, Tianjin 300384, China

出　　处：《Particuology》2019年第2期38-45,共8页颗粒学报（英文版）

摘　　要：Controlling the size of fragranee microcapsules using designed agitator paddles was investigated and studied by CFD simulation. First, different fluid flows were established by varying stirring speeds, reactor scales, and agitator paddle design, and the effects of each on particle size and distribution of prepared microcapsules were determined. The experimental results showed that the pattern design of orifices in the plate paddles control the flow field well. Narrow particle-size distributio ns of the microcapsules were obtained. The fluid flow characteristics including fluid velocity field, turbulent kinetic energy field, and shear stress distribution for thedifferent agitator paddle types in different reaction kettles were simulated using CFD tech no logy. The correlations between simulated data and experime ntal results were an alyzed. Significantly, the simulated average flow velocity was found to show good negative linear correlation w让h the average particle size of prepared microcapsules, with a correlation of y =-2.166x + 42.626.

关 键 词：FRAGRANCE MICROCAPSULE MELAMINE-FORMALDEHYDE Particle SIZE Orifice stirring PADDLE CFD simulation 

分 类 号：O3[理学—力学]