Competition between two dynamics : interface motion and collective motion of granular particles

两种动力学之间的竞争：界面运动和颗粒的集体运动

• 批准号: 21740293
• 负责人: YAMAZAKI Yoshihiro
• 金额: $ 0.58万
• 依托单位: Waseda University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21740293/
• 关键词: 界面運動; 粉粒体; シミュレーション; パターン形成; 統計物理学; 非平衡・非線形物理学; 数理モデル

The aggregation process of granules driven by the motion of water-air fronts in the drying process of two-dimensional wet granular systems is experimentally studied. And a model for the collective motion of granular particles induced by an interaction with interface motion is constructed. By the experiment and the numerical simulation, it is found that the model can qualitatively reproduce labyrinthine patterns that are quite similar to those experimentally obtained in the drying process of a water-granule mixture. Moreover, the stick-slip motion of the interfaces and fractal properties are confirmed in our model.

对二维湿颗粒体系干燥过程中水-空气锋面运动驱动的颗粒聚集过程进行了实验研究。并构建了由与界面运动相互作用引起的颗粒集体运动的模型。通过实验和数值模拟，发现该模型可以定性地再现与水颗粒混合物干燥过程中实验获得的迷宫图案非常相似的迷宫图案。此外，界面的粘滑运动和分形特性在我们的模型中得到了证实。