Simulation of gas flow over a micro cylinder

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	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.