| 粒子法中自由表面粒子识别 |
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| 引用本文： | 朱跃,姜胜耀,杨星团,段日强.粒子法中自由表面粒子识别[J].计算力学学报,2018,35(4):500-506. |
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| 作者姓名： | 朱跃 姜胜耀 杨星团 段日强 |
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| 作者单位： | 清华大学 核能与新能源技术研究院, 先进核能技术协同创新中心, 教育部先进反应堆工程与安全重点实验室, 北京 100084,清华大学 核能与新能源技术研究院, 先进核能技术协同创新中心, 教育部先进反应堆工程与安全重点实验室, 北京 100084,清华大学 核能与新能源技术研究院, 先进核能技术协同创新中心, 教育部先进反应堆工程与安全重点实验室, 北京 100084,清华大学 核能与新能源技术研究院, 先进核能技术协同创新中心, 教育部先进反应堆工程与安全重点实验室, 北京 100084 |
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| 基金项目： | 国家自然科学基金（11472155）资助项目. |
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| 摘 要： | 针对移动粒子半隐式法MPS（Moving Particle Semi-implicit Method）基于粒子数密度来判断自由表面会出现将内部粒子误判为自由表面粒子的问题，提出了一种结合几何法和体积法的自由表面粒子判定方法。通过对溃坝问题进行数值模拟，结果表明，全新的自由表面粒子判定方法对流体平稳运动以及剧烈运动两种工况，都能准确地判断出自由表面粒子，解决了基于粒子数密度判断方法因粒子分布稀疏产生误判的问题。JP2]这种全新的自由表面粒子判定方法对今后采用MPS方法计算两相流问题时，两种介质在界面处的传热传质计算有重要意义。
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| 关 键 词： | 粒子法 自由表面识别方法 移动粒子半隐式法 |
| 收稿时间： | 2017/4/25 0:00:00 |
| 修稿时间： | 2017/7/3 0:00:00 |
Free surface detection method in particle method |
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| ZHU Yue,JIANG Sheng-yao,YANG Xing-tuan,DUAN Ri-qiang.Free surface detection method in particle method[J].Chinese Journal of Computational Mechanics,2018,35(4):500-506. |
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| Authors: | ZHU Yue JIANG Sheng-yao YANG Xing-tuan DUAN Ri-qiang |
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| Institution: | Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China,Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China,Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China and Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China |
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| Abstract: | The conventional surface particle detection method based on the particle number density would lead to the misjudgement of surface particles.To address this issue,this paper proposes a new surface particle tracking method combining geometrical and volumetric principles.Through numerical simulation of dam break,the new surface particles tracking method achieves very good results in both smooth movement fluid and strenuous movement fluid.The simulation results show that this new method is effective in control of surface particle misjudgement,and the issue of misjudgement of surface particles based on the particle number density is solved.This new surface particle detection method has important implications for interfacial heat and mass transfer calculation in two-phase flow problems. |
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| Keywords: | particle method surface particle tracking method moving particle semi-implicit method |
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