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Verifying the tangential and normal restitution coefficients for double-sphere particles

机译：验证双球粒子的切向和正常恢复系数

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摘要

The collision between a single-sphere and a double-sphere is measured in this study by a high speed camera to verify the fundamental issue of tangential and normal restitution coefficients for a particular shape of double-sphere. In this experiment, a single-sphere moves and collides on a stationary double-sphere, and a high speed camera is used to capture the collision of them. Numerous tests were performed by varying the pre-collisional inclinations and pre-collisional velocities of the single-sphere. Two different definitions of the kinematic coefficient of restitutions, both normal and tangential, have been scrutinized by the experimental data to see which one is realistically true or reasonable. After comparison, the contact-point (surface) based definition is the right one which has almost case-independent value for the restitution coefficient, either in the normal or tangential direction. This verifies a key point which would be very useful for modeling the rigid body collisions, either spherical or non-spherical. (c) 2020 Elsevier B.V. All rights reserved.
机译：在本研究中，通过高速相机测量单个球体和双球之间的碰撞，以验证针对特定双球形形状的切向和正常恢复系数的基本问题。在该实验中，单个球体在固定双球上移动并碰撞，并且使用高速相机来捕获它们的碰撞。通过改变单个球体的预碰撞倾斜和碰撞速度来执行许多测试。通过实验数据仔细检查了正常和切向的运动系数的两个不同定义，均被仔细审查哪一个是真实的或合理的。比较之后，基于接触点（表面）的定义是右侧的右侧恢复系数与正常或切向方向的右侧。这验证了一个关键点，这对于建模刚性体碰撞，即球形或非球形是非常有用的。 （c）2020 Elsevier B.V.保留所有权利。

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  • 作者

    Zhang Shen; Gui Nan; Huang Xiaoli; Ge Liang; Yang XingTuan; Tu Jiyuan; Jiang Shengyao;

  • 作者单位

    Tsinghua Univ Collaborat Innovat Ctr Adv Nucl Energy Technol Inst Nucl &

    New Energy Technol Key Lab Adv Reactor Engn &

    Safety Minist Educ Beijing 100084 Peoples R China;

    Tsinghua Univ Collaborat Innovat Ctr Adv Nucl Energy Technol Inst Nucl &

    New Energy Technol Key Lab Adv Reactor Engn &

    Safety Minist Educ Beijing 100084 Peoples R China;

    Tsinghua Univ Collaborat Innovat Ctr Adv Nucl Energy Technol Inst Nucl &

    New Energy Technol Key Lab Adv Reactor Engn &

    Safety Minist Educ Beijing 100084 Peoples R China;

    Tsinghua Univ Collaborat Innovat Ctr Adv Nucl Energy Technol Inst Nucl &

    New Energy Technol Key Lab Adv Reactor Engn &

    Safety Minist Educ Beijing 100084 Peoples R China;

    Tsinghua Univ Collaborat Innovat Ctr Adv Nucl Energy Technol Inst Nucl &

    New Energy Technol Key Lab Adv Reactor Engn &

    Safety Minist Educ Beijing 100084 Peoples R China;

    Tsinghua Univ Collaborat Innovat Ctr Adv Nucl Energy Technol Inst Nucl &

    New Energy Technol Key Lab Adv Reactor Engn &

    Safety Minist Educ Beijing 100084 Peoples R China;

    Tsinghua Univ Collaborat Innovat Ctr Adv Nucl Energy Technol Inst Nucl &

    New Energy Technol Key Lab Adv Reactor Engn &

    Safety Minist Educ Beijing 100084 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 粉末技术;化学工业;
  • 关键词

    Particle; Collision dynamics; Rigid body; Coefficient of restitution; Double-sphere; Non-spherical particle;

    机译：粒子;碰撞动态;刚体;恢复系数;双球;非球形颗粒;

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