Development of a particle simulator for realistic clayey particles considering mechanical and electro-chemical forces - demystify microscopic mechanisms inside the 'house of cards' at micrometer scale

考虑机械力和电化学力的真实粘土粒子的粒子模拟器的开发 - 揭开微米尺度“纸牌屋”内部微观机制的神秘面纱

• 批准号: 21K04265
• 负责人: CHEN JIAN
• 金额: $ 1.91万
• 依托单位: Japan Agency for Marine-Earth Science and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-01 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21K04265/
• 关键词: clayey particle; plate particle geometry; discrete element method; adhesive contact; clayey particles; plate-like geometry; unit quaternions; particle simulator; non-spherical DEM; house-of-card effect; electro-chemical forces

The purpose of this project is to develop a particle simulator for realistic clayey particles. The Discrete Element Method (DEM) is widely recognized as a powerful tool for investigating the complex dynamics of granular materials from particle-scale interactions. In FY2021, we developed the framework using an extruded 3D polygon as the particle shape and solving unit-quaternion-based particle rotation in the body-fixed reference system. Based on this work, we gave an invited talk at an international conference in FY2022 and submitted a journal paper currently under review. There are three main components to a DEM approach: 1). Particle geometry and particle kinematics (especially particle rotation); 2) Interparticle interactions (also known as force models); and 3) Neighborhood detection. Since the first component was developed in FY2021, our research focus has been on the second component. For clayey particles, there are interparticle adhesion forces resulting from intermolecular interactions. To model such forces, we have reviewed existing research on adhesive contact and worked on necessary adaptations. We focus on two force models: a macroscopic Johnson-Kendall-Roberts (JKR) theory and microscopic Van-der-Waals force based formulation derived by Anandarajah and Chen. For the JKR theory, we derived a force-displacement relation that can be used for DEM simulations. For the Anandarajah-Chen model, which was derived for tilted cuboid particles interacting with an infinite wall, we investigated the necessary changes to model the forces between finite size particles.

该项目的目的是开发用于逼真的粘土颗粒的粒子模拟器。离散元素方法（DEM）被广泛认为是一种有力的工具，用于研究粒子尺度相互作用的颗粒材料的复杂动力学。在2021财年，我们使用挤出的3D多边形作为粒子形状并求解了人体固定参考系统中的基于单元 - 定点的粒子旋转。基于这项工作，我们在2022财年的国际会议上发表了一场邀请的演讲，并提交了目前正在审查的期刊论文。 DEM方法有三个主要组成部分：1）。粒子几何和粒子运动学（尤其是粒子旋转）； 2）颗粒间相互作用（也称为力模型）； 3）邻里检测。由于第一个组件是在2021财年开发的，因此我们的研究重点一直是第二部分。对于粘土颗粒，由分子间相互作用引起的颗粒粘附力。为了模拟此类力量，我们已经审查了有关粘合剂接触的现有研究，并进行了必要的适应。我们专注于两个力模型：宏观的约翰逊 - 肯德尔·罗伯茨（JKR）理论和基于Anandarajah和Chen得出的基于微观的Van-Waals力。对于JKR理论，我们得出了一个可以用于DEM模拟的力解位关系。对于针对与无限壁相互作用的倾斜的立方体颗粒得出的Anandarajah-Chen模型，我们研究了必要的更改，以模拟有限尺寸颗粒之间的力。

项目成果

Experimental study of particle shape dependence of avalanches inside a rotating drum

• DOI: 10.1051/epjconf/202124906001
• 发表时间: 2021
• 期刊: Epj Web of Conferences
• 作者: Jian Chen;D. Krengel;H. Matuttis

Influence of material properties on the mechanical responses of an underwater soil mixing process

材料特性对水下土壤混合过程机械响应的影响

• 发表时间: 2021
• 作者: 浜田光太郎;山崎大;新田友子;Jian Chen
• 通讯作者: Jian Chen

Analyzing effects of microscopic material parameters on macroscopic mechanical responses in underwater mixing using discrete element method

• DOI: 10.1016/j.powtec.2022.117304
• 发表时间: 2022-03
• 期刊: Powder Technology
• 影响因子: 5.2
• 作者: Jian Chen-;A. Kitamura;E. Barbieri;D. Nishiura;M. Furuichi

Discrete Element Simulations from two-dimensions with polygons to three dimensions with rods

离散元模拟从带有多边形的二维到带有杆的三维

• 发表时间: 2022
• 作者: Yuki Shimizu;Hans-Georg Matuttis;Dominik Krengel;Jian Chen
• 通讯作者: Jian Chen

Toward real-scale DEM simulations of landslide: periodic granular box for initializing slope geometry

实现滑坡的真实规模 DEM 模拟：用于初始化斜坡几何形状的周期性颗粒盒

• 发表时间: 2023
• 作者: Mikoto Furuichi;Daisuke Nishiura;Jian Chen
• 通讯作者: Jian Chen