Global Convection Characteristics of Conical Taylor‐Couette Flow with Shear‐Thinning Fluids
Global Convection Characteristics of Conical Taylor‐Couette Flow with Shear‐Thinning Fluids
复制标题
剪切稀化流体圆锥泰勒-库埃特流的整体对流特性
DOI：
10.1002/ceat.202100236
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Ohmura Naoto
中科院分区：
文献类型：
--
作者：
Masuda Hayato;Iyota Hiroyuki;Ohmura Naoto
提出了一种增强剪切稀化流体中标量组分混合过程的方法。锥形Taylor - Couette流动使流体元件在整个流体柱中循环，这是由于全球循环流动（即经向流动），从而在Taylor细胞内保持良好的局部混合。数值模拟了对流和混合特性。经向流动随着剪切减薄的增加而增强。此外，使用被动示踪剂对混合性能进行了评价。与牛顿流体相比，增强的经向流动促进了剪切稀化流体的整体混合。因此，锥形Taylor - Couette装置可用于强化剪切-稀化流体体系中的混合过程。
A method to intensify the mixing process of scalar components within shear‐thinning fluids is proposed. A conical Taylor‐Couette flow enabled fluid elements to circulate in the entire fluid column owing to the global circulation flow (i.e., meridional flow) for keeping good local mixing within Taylor cells. The global convection and mixing characteristics were numerically investigated. The meridional flow was found to be enhanced with increasing shear‐thinning. In addition, the mixing performance was evaluated using a passive tracer. Global mixing with shear‐thinning fluids was promoted by the enhanced meridional flow compared with that of Newtonian fluids. Therefore, the conical Taylor‐Couette apparatus could be used for intensifying mixing processes in shear‐thinning fluid systems.