Simulation of gas flow over a micro cylinder | |
Hu Y(胡远); Sun QH(孙泉华); Fan J(樊菁); Sun QH(孙泉华) | |
2009-12-28 | |
会议名称 | The 2nd ASME Micro/Nanoscale Heat & Mass Transfer International Conference (MNHMT09) |
会议日期 | 2009-12 |
通讯作者邮箱 | qsun@imech.ac.cn |
会议地点 | Shanghai |
通讯作者 | 孙泉华 |
中文摘要 | Gas flow over a micro cylinder is simulated using both a compressible Navier-Stokes solver and a hybrid continuum /particle approach. The micro cylinder flow has low Reynolds number because of the small length scale and the low speed, which also indicates that the rarefied gas effect exists in the flow. A cylinder having a diameter of 20 microns is simulated under several flow conditions where the Reynolds number ranges from 2 to 50 and the Mach number varies from 0.1 to 0.8. It is found that the low Reynolds number flow can be compressible even when the Mach number is less than 0.3, and the drag coefficient of the cylinder increases when the Reynolds number decreases. The compressible effect will increase the pressure drag coefficient although the friction coefficient remains nearly unchanged. The rarefied gas effect will reduce both the friction and pressure drag coefficients, and the vortex in the flow may be shrunk or even disappear. |
收录类别 | CPCI-S ; EI |
合作状况 | 其它 |
会议录 | Proceedings of the ASME 2009 2nd Micro/Nanoscale Heat & Mass Transfer International Conference MNHMT2009 December 18-21, 2009, Shanghai, China. |
学科主题 | 流体力学 |
语种 | 英语 |
WOS记录号 | WOS:000282724000017 |
内容类型 | 会议论文 |
源URL | [http://dspace.imech.ac.cn/handle/311007/32993] |
专题 | 力学研究所_高温气体动力学国家重点实验室 |
通讯作者 | Sun QH(孙泉华) |
推荐引用方式 GB/T 7714 | Hu Y,Sun QH,Fan J,et al. Simulation of gas flow over a micro cylinder[C]. 见:The 2nd ASME Micro/Nanoscale Heat & Mass Transfer International Conference (MNHMT09). Shanghai. 2009-12. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
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