| 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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| Source Publication | Rarefied Gas Dynamics |
| 2009 | |
| Pages | 359-364 |
| Conference Name | 26th International Symposium on Rarefied Gas Dynmaics (RGD26) |
| Conference Date | JUN 20-JUL 25, 2008 |
| Conference Place | Kyoto, JAPAN |
| Abstract | 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. |
| Keyword | Hydrodynamic Instability Rayleigh-benard Flows Dsmc Ip Method Rarefied-gas Flows Monte-carlo Method Statistical Simulation Attractors |
| WOS ID | WOS:000265564800058 |
| ISBN | 978-0-7354-0615-5 |
| Indexed By | CPCI-S |
| Language | 英语 |
| Citation statistics | |
| Document Type | 会议论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/25358 |
| Collection | 高温气体动力学国家重点实验室 |
| Corresponding Author | Zhang J |
| Recommended Citation 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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