Global Convection Characteristics of Conical Taylor‐Couette Flow with Shear‐Thinning Fluids. Issue 11 (28th September 2021)

• Record Type: Journal Article
• Authors: Masuda, Hayato; Iyota, Hiroyuki; Ohmura, Naoto
• Other Names: Obalová Lucie guestEditor.
• Is Part Of: Chemical engineering & technology. Volume 44:Issue 11(2021)
• Page Start: 2049
• Page End: 2055
• Publication Date: 2021-09-28
• Subjects: Conical Taylor‐Couette flow -- Mixing intensification -- Numerical simulation -- Shear‐thinning fluid; Chemical engineering -- Periodicals; Chemical processes -- Periodicals; 660.05
• DOI: 10.1002/ceat.202100236
• Languages: English
• ISSNs: 0930-7516

Abstract

Abstract: 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. Abstract : A conical Taylor‐Couette flow was utilized as a mixing device. A global convection, i.e., meridional flow, intensifies the global mixing keeping good local mixing within Taylor cells. The meridional flow was found to be enhanced with increasing shear‐thinning. Thus, global mixing with shear‐thinning fluids was promoted by the enhanced meridional flow compared with that of Newtonian fluids.