Nonequilibrium dynamics of granular materials yielding under shear - viscoelastic response and avalanches

2017 Fiscal Year Final Research Report

• Project/Area Number: 16H06628
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Mathematical physics/Fundamental condensed matter physics
• Research Institution: Tohoku University
• Principal Investigator: Saitoh Kuniyasu 東北大学, 数理科学連携研究センター, 准教授 (10775753)
• Project Period (FY): 2016-08-26 – 2018-03-31
• Keywords: 粘弾性 / 乱流 / 分子動力学法 / レオロジー

Outline of Final Research Achievements

Granular materials are ubiquitous in nature and the rheology of granular materials has a great importance in industry. In this research, we investigate complex dynamics of granular materials by molecular dynamics (MD) simulations. Applying simple shear deformations to the system, we study collective motions and turbulent-like vortex structures of non-affine velocities of granular materials. The complex dynamics of non-affine velocities are directly related to strong spatial correlations. We find that the spatial correlations are significant if the density of granular materials is high and the system is yielding under simple shear deformations. We also reveal the strong connection between the complex dynamics of non-affine velocities and the rheology of dense granular maetrials.

Free Research Field

非平衡統計力学