Molecular Motion in Isotropic Turbulence

	Molecular Motion in Isotropic Turbulence
	Fan J(樊菁); Jiang JZ(蒋建政); Fei F(费飞); Fan, J (reprint author), Chinese Acad Sci, Inst Mech, Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
会议录名称	27TH INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS, 2010, PTS ONE AND TWO
	2011
页码	1385-1390
会议名称	27th International Symposium on Rarefied Gas Dynamics
会议日期	JUL 10-15, 2010
会议地点	Pacific Grove, CA
摘要	Molecular motion in turbulence is a major fundamental and engineering problem, and the classical particle approaches are difficult to solve it because of a wide separation of temporal and spatial scales between thermal motion and turbulent fluctuation. A hybrid method named as tracer molecules in continuum (TMIC) has been proposed to address the issues. Using the TMIC method, molecular motion in isotropic turbulence was investigated, and the Reynolds number based on the Taylor micro-scale was about 68. The TMIC calculation shows that tracer molecules are dominated by the thermal motion when time is comparable to the mean collision time, and by the turbulent fluctuation when time is comparable to the integral time scale of turbulence. Between the two time scales, a mixed mode prevails for which both thermal motion and turbulent fluctuation are important. The corresponding turbulent diffusion and viscosity coefficients obtained by TMIC are about 1.2 x 10(-3) m(2) sec(-1) and 7.5 x 10(-3) Nm(-2) sec, respectively, two orders larger than those due to thermal motion
关键词	Isotropic Turbulence Tracer Molecule Tmic Dns Dsmc
课题组名称	LHD微尺度和非平衡流动
资助信息	Asilomar Conf Grounds
ISBN号	978-0-7354-0889-0
URL	查看原文
收录类别	CPCI
语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/45276
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, Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Fan J,Jiang JZ,Fei F,et al. Molecular Motion in Isotropic Turbulence[C]27TH INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS, 2010, PTS ONE AND TWO,2011:1385-1390.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Conf2011-025.pdf（326KB）			开放获取	--	浏览下载