| A diffusive information preservation method for small Knudsen number flows | |
Fei F(费飞) ; Fan J(樊菁); Fan, J (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
| |
| 发表期刊 | JOURNAL OF COMPUTATIONAL PHYSICS
 |
| 2013-06-15 | |
| 卷号 | 243页码:179-193 |
| ISSN | 0021-9991 |
| 摘要 | The direct simulation Monte Carlo (DSMC) method is a powerful particle-based method for modeling gas flows. It works well for relatively large Knudsen (Kn) numbers, typically larger than 0.01, but quickly becomes computationally intensive as Kn decreases due to its time step and cell size limitations. An alternative approach was proposed to relax or remove these limitations, based on replacing pairwise collisions with a stochastic model corresponding to the Fokker–Planck equation [J. Comput. Phys., 229, 1077 (2010); J. Fluid Mech., 680, 574 (2011)]. Similar to the DSMC method, the downside of that approach suffers from computationally statistical noise. To solve the problem, a diffusion-based information preservation (D-IP) method has been developed. The main idea is to track the motion of a simulated molecule from the diffusive standpoint, and obtain the flow velocity and temperature through sampling and averaging the IP quantities. To validate the idea and the corresponding model, several benchmark problems with Kn ~ 10^(-3)–10^(-4) have been investigated. It is shown that the IP calculations are not only accurate, but also efficient because they make possible using a time step and cell size over an order of magnitude larger than the mean collision time and mean free path, respectively. |
| 关键词 | Dsmc Ip Molecular Diffusion Time Step Cell Size |
| 学科领域 | 稀薄气体力学 |
| URL | 查看原文 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000319050800012 |
| 项目资助者 | National Natural Science Foundation of China [10921062] |
| 课题组名称 | LHD微尺度和非平衡流动 |
| 论文分区 | 一类 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/47304 |
| 专题 | 高温气体动力学国家重点实验室 |
| 通讯作者 | Fan, J (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Fei F,Fan J,Fan, J . A diffusive information preservation method for small Knudsen number flows[J]. JOURNAL OF COMPUTATIONAL PHYSICS,2013,243:179-193. |
| APA | 费飞,樊菁,&Fan, J .(2013).A diffusive information preservation method for small Knudsen number flows.JOURNAL OF COMPUTATIONAL PHYSICS,243,179-193. |
| MLA | 费飞,et al."A diffusive information preservation method for small Knudsen number flows".JOURNAL OF COMPUTATIONAL PHYSICS 243(2013):179-193. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| IMCAS-J2013-105.pdf（1093KB） | 开放获取 | -- | 浏览 请求全文 | |||
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论