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论文类型：期刊论文

发表时间：2015-11-01

发表刊物：POWDER TECHNOLOGY

收录刊物：SCIE、EI、Scopus

卷号：284

页面范围：418-428

ISSN号：0032-5910

关键字：Micro-particle; Temperature; Contact force; Damping coefficient; Deposition

摘要：A dynamic model has been developed to simulate the normal impact of micro-sized SiO2 particle onto a flat surface at different experimental temperatures. The model describes the impact process through the combination of the static contact theory proposed by Brach et al. and energy dissipation considering both adhesion effect and viscoelastic effect. The present paper focuses on the effects of particle size, incident velocity, temperature, and damping coefficient on the particle/surface collisions. The model is verified by comparing the predicted critical velocities with the experimental results. Specifically, temperature and damping coefficient were treated as variables except for particle size and incident velocity. The influences of the contact force and the contact displacement on the contact time were also analyzed. It is found that both adhesion effect and viscoelastic effect increase with increasing surface temperature, which leads to the increase of critical velocity. (C) 2015 Elsevier B.V. All rights reserved.