| Information Preservation Modeling of Rayleigh-Benard Transition from Thermal Conduction to Convection | |
Zhang J(张俊) ; Fan J(樊菁); Zhang J
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| 会议录名称 | Rarefied Gas Dynamics |
| 2009 | |
| 页码 | 359-364 |
| 会议名称 | 26th International Symposium on Rarefied Gas Dynmaics (RGD26) |
| 会议日期 | JUN 20-JUL 25, 2008 |
| 会议地点 | Kyoto, JAPAN |
| 摘要 | Onset and evolution of the Rayleigh-Benard (R-B) convection are investigated using the Information Preservation (IP) method. The information velocity and temperature are updated using the Octant Flux Splitting (OFS) model developed by Masters & Ye based on the Maxwell transport equation suggested by Sun & Boyd. Statistical noise inherent in particle approaches such as the direct simulation Monte Carlo (DSMC) method is effectively reduced by the IP method, and therefore the evolutions from an initial quiescent fluid to a final steady state are shown clearly. An interesting phenomenon is observed: when the Rayleigh number (Ra) exceeds its critical value, there exists an obvious incubation stage. During the incubation stage, the vortex structure clearly appears and evolves, whereas the Nusselt number (Nu) of the lower plate is close to unity. After the incubation stage, the vortex velocity and Nu rapidly increase, and the flow field quickly reaches a steady, convective state. A relation of Nu to Ra given by IP agrees with those given by DSMC, the classical theory and experimental data. |
| 关键词 | Hydrodynamic Instability Rayleigh-benard Flows Dsmc Ip Method Rarefied-gas Flows Monte-carlo Method Statistical Simulation Attractors |
| WOS记录号 | WOS:000265564800058 |
| ISBN号 | 978-0-7354-0615-5 |
| 收录类别 | CPCI-S |
| 语种 | 英语 |
| 引用统计 | |
| 文献类型 | 会议论文 |
| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/25358 |
| 专题 | 高温气体动力学国家重点实验室 |
| 通讯作者 | Zhang J |
| 推荐引用方式 GB/T 7714 | Zhang J,Fan J,Zhang J. Information Preservation Modeling of Rayleigh-Benard Transition from Thermal Conduction to Convection[C]Rarefied Gas Dynamics,2009:359-364. |
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