| 基于Level-Set的多介质流体动力学数值分析 |
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| 引用本文： | 张志江,徐更光,史锐.基于Level-Set的多介质流体动力学数值分析[J].北京理工大学学报,2007,27(11):948-951. |
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| 作者姓名： | 张志江 徐更光 史锐 |
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| 作者单位： | 北京理工大学,爆炸科学与技术国家重点实验室,北京,100081;北京理工大学,爆炸科学与技术国家重点实验室,北京,100081;北京理工大学,爆炸科学与技术国家重点实验室,北京,100081 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 针对水中爆炸中涉及的多介质高压比和高密度比数值计算精度不高的问题,提出了解决该类问题的可行性方法,并对该方法进行了程序实现.该方法利用位标函数追踪多介质流体运动界面,采用修正的虚拟流体方法对界面进行了处理.通过黎曼问题、激波打击气泡和激波打击液气面问题的计算,得出计算结果与理论分析结果吻合.TNT水中爆炸的计算结果与实验相似律求得的冲击波参数对比表明,两者计算结果比较吻合.
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| 关 键 词： | 位标函数 虚拟流体方法 水下爆炸 |
| 文章编号： | 1001-0645（2007）11-0948-04 |
| 收稿时间： | 8/2/2007 12:00:00 AM |
| 修稿时间： | 2007-08-02 |
Numeration of Multi-Material Hydrokinetics Based on Level-Set |
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| ZHANG Zhi-jiang,XU Geng-guang and SHI-Rui.Numeration of Multi-Material Hydrokinetics Based on Level-Set[J].Journal of Beijing Institute of Technology(Natural Science Edition),2007,27(11):948-951. |
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| Authors: | ZHANG Zhi-jiang XU Geng-guang and SHI-Rui |
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| Institution: | State Key Laboratory of Explosion Science and Technology, Beiiing Institute of Technology, Beiiing 100081, China |
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| Abstract: | The precision of numerical calculation of high density ratio or high pressure ratio problems such as underwater explosion is so far comparably low at present.An effective method to solve such problems is suggested.A program was written with this method.It catches the interface of the multi-medium fluid with levelset and deals with the interface with the modified ghost fluid method.Some Riemann problems and problems about shock wave impacting the interface of the liquid and air have been calculated with this program.The result fits the theory well.Underwater explosion of TNT calculated by this program was finally analysed.The results proved to be consistent with those calculated by similar explosion rules. |
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| Keywords: | level-set ghost fluid method(GFM) underwater-explosion |
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