Near continuum flows over a sphere

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	Near continuum flows over a sphere
	Cai CP; Sun QH(孙泉华)
刊名	COMPUTERS & FLUIDS
	2015-04-16
通讯作者邮箱	ccai@nmsu.edu
卷号	111 页码:62-68
关键词	Flow computation Navier-Stokes equations Slip flows
ISSN号	0045-7930
通讯作者	Cai, CP (reprint author), New Mexico State Univ, Dept Mech & Aerosp Engn, Jett Hall 110,MSC 3450, Las Cruces, NM 88003 USA.
产权排序	[Cai, Chunpei] New Mexico State Univ, Dept Mech & Aerosp Engn, Las Cruces, NM 88003 USA; [Sun, Quanhua] Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
中文摘要	In this paper, the problem of near continuum gas flows over a sphere is investigated numerically. Three types of boundary conditions for the sphere surface are adopted: (1) non-slip and constant temperature surface; (2) velocity slip with considerations of velocity gradient, and temperature jump at the surface; and (3) velocity slip with considerations of both velocity and temperature gradients, as well as temperature jump at the surface. Navier-Stokes equations in a cylindrical coordinate system for compressible flows are adopted with the Roe numerical scheme. The numerical simulation results include coefficient distributions for surface pressure, friction, heat flux, velocity slip, temperature jump and total drag. The results are obtained with different free stream Knudsen and Mach numbers. Several conclusions include: (i) the third surface boundary condition does not create significant differences from the second type, (ii) however, an adoption of non-slip or a slip surface boundary condition can create significant differences in Cf Cq and CD. (C) 2015 Elsevier Ltd. All rights reserved.
学科主题	Computer Science, Interdisciplinary Applications; Mechanics
分类号	二类/Q2
类目[WOS]	Computer Science, Interdisciplinary Applications ; Mechanics
研究领域[WOS]	Computer Science ; Mechanics
收录类别	SCI ; EI
原文出处	http://dx.doi.org/10.1016/j.compfluid.2015.01.004
语种	英语
WOS记录号	WOS:000352051000005
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/49913]
专题	力学研究所_高温气体动力学国家重点实验室
推荐引用方式 GB/T 7714	Cai CP,Sun QH. Near continuum flows over a sphere[J]. COMPUTERS & FLUIDS,2015,111:62-68.
APA	Cai CP,&孙泉华.(2015).Near continuum flows over a sphere.COMPUTERS & FLUIDS,111,62-68.
MLA	Cai CP,et al."Near continuum flows over a sphere".COMPUTERS & FLUIDS 111(2015):62-68.