| 大尺度网格下DSMC仿真碰撞概率的修正方法 |
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| 引用本文： | 黄飞,靳旭红,赵波,程晓丽,沈清. 大尺度网格下DSMC仿真碰撞概率的修正方法[J]. 计算力学学报, 2015, 32(1): 21-26 |
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| 作者姓名： | 黄飞 靳旭红 赵波 程晓丽 沈清 |
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| 作者单位： | 中国航天空气动力技术研究院,北京,100074 |
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| 基金项目： | 国家自然科学基金(11402255)资助项目. |
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| 摘 要： | 从DSMC碰撞概率的实现途径出发,通过引入最小二乘法及亚松弛的思想给出一种大尺度网格下分子仿真碰撞概率的修正方法,将该方法应用于非结构四面体网格下的DSMC模拟中,计算分析了文献中钝锥模型的绕流结果,数值结果初步验证了本文方法的合理性和有效性。
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| 关 键 词： | DSMC 非结构网格 碰撞概率 最小二乘法 |
| 收稿时间： | 2013-08-26 |
| 修稿时间： | 2013-10-21 |
A modification technique of collision probability on coarse grid in the direct simulation monte carlo method |
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| HUANG Fei,JIN Xu-hong,ZHAO Bo,CHENG Xiao-li and SHEN Qing. A modification technique of collision probability on coarse grid in the direct simulation monte carlo method[J]. Chinese Journal of Computational Mechanics, 2015, 32(1): 21-26 |
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| Authors: | HUANG Fei JIN Xu-hong ZHAO Bo CHENG Xiao-li SHEN Qing |
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| Affiliation: | Chinese Academy of Aerospace Aerodynamics, Beijing 100074, China;Chinese Academy of Aerospace Aerodynamics, Beijing 100074, China;Chinese Academy of Aerospace Aerodynamics, Beijing 100074, China;Chinese Academy of Aerospace Aerodynamics, Beijing 100074, China;Chinese Academy of Aerospace Aerodynamics, Beijing 100074, China |
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| Abstract: | A new modification technique of collision probability with least square method and sub-relaxation technique is introduced to improve simulation precision in DSMC with coarse grid size.The new method is applied to direct simulation Monte Carlo method based on unstructured tetrahedral cells.Flow around blunt cone is investigated,and the numerical results confirm feasibility of the modification technique. |
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| Keywords: | DSMC unstructured grid collision probability least square method |
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