Microrheology of non-Newtonian fluids under shear flow

2016 Fiscal Year Final Research Report

• Project/Area Number: 26289032
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Fluid engineering
• Research Institution: Hokkaido University
• Principal Investigator: Hiroshi Orihara 北海道大学, 工学(系)研究科(研究院), 教授 (30177307)
• Co-Investigator(Kenkyū-buntansha): 佐々木 裕司 北海道大学, 工学(系)研究科(研究院), 助教 (00649741)
• Co-Investigator(Renkei-kenkyūsha): NAKAGAKI TOSHIYUKI 北海道大学, 電子科学研究所, 教授 (70300887)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 液晶 / マイクロレオロジー / せん断流 / コロイド

Outline of Final Research Achievements

Soft matter such as polymers and liquid crystals has microscopic structures, which interplay with flow. We have investigated the effect of the structure on the rheological properties related to shear flow by applying microrheology. First, we observed both orientation and shear flow fluctuations at equilibrium to obtain the cross-correlation function between them, and elucidated the existence of interplay. Furthermore, we compared the experiment with a theoretical result derived from the Ericksen-Leslie Theory. Next, we observed sheared particles dispersed in a xthantan solution and found an anomalous diffusion due to the molecular interaction.

Free Research Field

ソフトマター物理学