IMECH-IR  > 高温气体动力学国家重点实验室
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
Source Publication27TH INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS, 2010, PTS ONE AND TWO
2011
Pages1385-1390
Conference Name27th International Symposium on Rarefied Gas Dynamics
Conference DateJUL 10-15, 2010
Conference PlacePacific Grove, CA
AbstractMolecular 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
KeywordIsotropic Turbulence Tracer Molecule Tmic Dns Dsmc
DepartmentLHD微尺度和非平衡流动
Funding OrganizationAsilomar Conf Grounds
ISBN978-0-7354-0889-0
URL查看原文
Indexed ByCPCI
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/45276
Collection高温气体动力学国家重点实验室
Corresponding AuthorFan, J (reprint author), Chinese Acad Sci, Inst Mech, Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
Recommended Citation
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.
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