Evaluation of nonequilibrium fluctuation focused on self-propelled droplets and their collective motion

2014 Fiscal Year Final Research Report

• Project/Area Number: 24740287
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Biophysics/Chemical physics
• Research Institution: Tokyo University of Science (2014); Aichi University of Education (2012-2013)
• Principal Investigator: SUMINO Yutaka 東京理科大学, 理学部, 講師 (00518384)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 非平衡物理 / 界面揺らぎ / 自発運動 / 集団運動 / ソフトマター / 散逸構造

Outline of Final Research Achievements

In this project, we aimed to unveil the characteristics of fluctuation and noise in far-from-equilibrium conditions; especially focused on the self-propelled droplets and their collective motion. For this purpose, spontaneous interfacial agitation, self-propelled object, and the collective behavior of self-propelled objects are investigated.
As for the researches on interfacial agitation, we investigated the effect of wettability imbalance, Marangoni effect, and aggregate formation. For these researches, experimental aspect showed progress. Notably, we developed mathematical model for the interfacial fluctuation due to aggregate formation. As for the research on self-propelled objects, we studied theoretical aspect of a self-propelled droplet driven by Marangoni effect. As for the collective behavior of self-propelled particles, we numerically and theoretically studied nonequilibrium phase, which appeared as a result of memory effect.

Free Research Field

非平衡ソフトマター物理学