| 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
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| Source Publication | 27TH INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS, 2010, PTS ONE AND TWO |
| 2011 | |
| Pages | 1385-1390 |
| Conference Name | 27th International Symposium on Rarefied Gas Dynamics |
| Conference Date | JUL 10-15, 2010 |
| Conference Place | Pacific Grove, CA |
| Abstract | 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 |
| Keyword | Isotropic Turbulence Tracer Molecule Tmic Dns Dsmc |
| Department | LHD微尺度和非平衡流动 |
| Funding Organization | Asilomar Conf Grounds |
| ISBN | 978-0-7354-0889-0 |
| URL | 查看原文 |
| Indexed By | CPCI |
| Language | 英语 |
| Document Type | 会议论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/45276 |
| Collection | 高温气体动力学国家重点实验室 |
| Corresponding Author | Fan, 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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