Kinetic modeling and multiscale mechanism in collective behaviors of microorganisms

2017 Fiscal Year Final Research Report

• Project/Area Number: 15KT0110
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 特設分野
• Research Field: Mathematical Sciences in Search of New Cooperation
• Research Institution: University of Hyogo
• Principal Investigator: Yasuda Shugo 兵庫県立大学, シミュレーション学研究科, 准教授 (70456797)
• Co-Investigator(Kenkyū-buntansha): 青木 一生 京都大学, 工学研究科, 名誉教授 (10115777) ; 西畑 伸也 東京工業大学, 情報理工学院, 教授 (80279299)
• Co-Investigator(Renkei-kenkyūsha): YAMAMOTO Ryoichi 京都大学, 工学研究科, 教授 (10263401)
• Project Period (FY): 2015-07-10 – 2018-03-31
• Keywords: 自己組織化 / 走化性バクテリア / 運動論 / メゾスコピック

Outline of Final Research Achievements

We carried out numerical and theoretical studies on the traveling wave and aggregation of bacteria, which are fundamental problems in the cluster formation dynamics, based on a kinetic chemotaxis model.
In the traveling wave problem, we theoretically obtained a dispersion relation of the population traveling wave of bacteria and numerically uncovered the variety of traveling wave solutions. In the aggregation problem, we theoretically obtained a linear instability condition, under which the bacteria create patterns from a uniform constant state. We also developed a new mesoscopic simulation method, i.e., a Monte Carlo simulation for chemotactic bacteria. The accuracy and validity of the Monte Carlo method has been established throughout comparisons of theoretical and experimental results.
This study fundamentally contributes to establishing a new academic research field, i.e., the study of active fluids.

Free Research Field

計算科学