激光照射金颗粒在散射效应下的相变传热

doi:10.19596/j.cnki.1001-246x.7827

计算物理 ›› 2019, Vol. 36 ›› Issue (2): 182-188.DOI: 10.19596/j.cnki.1001-246x.7827

激光照射金颗粒在散射效应下的相变传热

贺云龙, 李凌

上海理工大学能源与动力工程学院, 上海 200093

收稿日期:2018-01-05 修回日期:2018-05-22 出版日期:2019-03-25 发布日期:2019-03-25
通讯作者: 李凌(1976-),女,博士,教授,主要从事微尺度传热研究,E-mail:liling@usst.edu.cn
作者简介:贺云龙(1988-),男,硕士生,主要从事激光与物质相互作用研究,E-mail:hylmydc@163.com
基金资助:
国家自然科学基金（51476102）资助项目

Heat Transfer and Phase Change of Laser Irradiated Gold Particle with Scattering Effect

HE Yunlong, LI Ling

School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

Received:2018-01-05 Revised:2018-05-22 Online:2019-03-25 Published:2019-03-25

摘要/Abstract

摘要： 采用二维双温度模型结合散射作用所引起颗粒表面光强不均匀分布的结果，对单脉冲激光垂直照射金颗粒的相变传热进行研究，通过将界面能量平衡方程，成核动力学的界面追踪法相耦合来确定固液界面的位置并研究激光参数对烧结过程的影响.结果表明：当激光垂直照射金颗粒时，熔化现象主要发生在颗粒的两极且底部熔化开始时间早，熔化体积也比较小.激光的脉宽越短熔化开始时间越早，熔化体积越大.提高激光的能量密度，颗粒的熔化体积也随之增加.

关键词: 激光光学, 散射效应, 二维双温度模型, 固液界面, 烧结

Abstract: Phase change heat transfer of a gold particle irradiated by ulter-fast laser was studied. Position of solid-liquid interface was determined with coupling interface energy balance equation and interface tracking method for nucleation dynamics. In addition, effects of laser parameters on sintering process were studied. It showed that as laser irradiates gold particle vertically, melting phenomenon occurs mainly in poles of particle. Bottom of particle melts earlier than top and melting volume is smaller. As laser pulse width becomes shorter melting is earlier and melting volume increases. Melting degree of particle increases with laser heat source fluence.

Key words: laser optics, scattering effect, two-dimensional two-temperature model, solid-liquid interface, sintering

中图分类号:

O436

贺云龙, 李凌. 激光照射金颗粒在散射效应下的相变传热[J]. 计算物理, 2019, 36(2): 182-188.

HE Yunlong, LI Ling. Heat Transfer and Phase Change of Laser Irradiated Gold Particle with Scattering Effect[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2019, 36(2): 182-188.

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激光照射金颗粒在散射效应下的相变传热

Heat Transfer and Phase Change of Laser Irradiated Gold Particle with Scattering Effect

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