Molecular dynamics simulation on the energy exchanges and adhesion probability of a nano-sized particle colliding with a weakly attractive static surface
Molecular dynamics simulation on the energy exchanges and adhesion probability of a nano-sized particle colliding with a weakly attractive static surface
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DOI：
10.1016/j.jaerosci.2010.05.001
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发表时间：
2010-08-01
影响因子：
4.5
通讯作者：
Yoon, Woong-sup
中科院分区：
文献类型：
--
作者：
Jung, Seung-chai;Suh, Donguk;Yoon, Woong-sup
用分子动力学方法研究了由1055个分子组成的Lennard-Jones粒子与弱引力刚性表面的碰撞。不同的能量交换，如动能转换为变形能和转动能，热耗散，和动能的回收表明，它们的路线是由碰撞速度区分。在较低的碰撞速度下，大部分损失的能量转化为粒子的旋转能量。然而，在较高的碰撞速度下，大部分入射动能被消耗为粒子势能和热能，同时发生固-固相变。当碰撞前或碰撞后的韦伯数小于1时，粘附概率大于0.5，但在碰撞从弹性过渡到塑性状态的中间碰撞速度范围内下降较低。在该粒度下未观察到热回弹。(C)2010爱思唯尔有限公司版权所有。
Collisions of a Lennard-Jones particle comprised of 1055 molecules onto a weakly attractive rigid surface are numerically investigated using the molecular dynamics simulation. Diverse energy exchanges such as the kinetic energy transfer into deformation and rotational energy, heat dissipation, and the recovery of the kinetic energy show that their routes are distinguished by the collision velocity. At lower collision velocities, large part of the lost energy is converted into the particle rotational energy. At higher collision velocities, however, greater part of the incident kinetic energy is consumed into the particle potential and thermal energy while solid-to-solid phase transition occurs. Adhesion probability is greater than 0.5 when the Weber number before or after the collision is less than unity, but drops lower in intermediate collision velocity range in which the collision transits from elastic to plastic regime. Thermal rebound was not observed in this particle size. (C) 2010 Elsevier Ltd. All rights reserved.