The effects of near-field hydrodynamic interactions on collective dynamics of microorganisms

2016 Fiscal Year Final Research Report

• Project/Area Number: 26400425
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Biological physics/Chemical physics/Soft matter physics
• Research Institution: The University of Tokyo
• Principal Investigator: Furukawa Akira 東京大学, 生産技術研究所, 准教授 (20508139)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: アクティブマター / ソフトマター / 流体力学的相互作用

Outline of Final Research Achievements

In this project, I studied the effects of near-field hydrodynamic interactions (HIs) on the collective dynamics of model active suspensions and found the following: When the separation between swimmers is comparable to their size, the swimmers' motions are strongly affected by activity-induced hydrodynamic forces. With HIs, the dynamic clustering is enhanced at a relatively small volume fraction, which can be attributed to the active force induced hydrodynamic trapping of one swimmer by another. In this relation, I also studied the role of HIs on the colloidal gelation and the nonlinear rheology in high density glassy liquids.

Free Research Field

ソフトマター、複雑流体