| Viscosity,heat conductivity,and Prandtl number effects in the Rayleigh–Taylor Instability |
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| 作者姓名： | Feng Chen Ai-Guo Xu Guang-Cai Zhang |
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| 摘 要： |
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Viscosity,heat conductivity,and Prandtl number effects in the Rayleigh–Taylor Instability |
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| Feng Chen,Ai-Guo Xu,Guang-Cai Zhang.Viscosity,heat conductivity,and Prandtl number effects in the Rayleigh–Taylor Instability[J].Frontiers of Physics,2016,11(6):114703. |
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| Authors: | Feng Chen Ai-Guo Xu Guang-Cai Zhang |
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| Institution: | 1. School of Aeronautics, Shan Dong Jiaotong University, Jinan 250357, China2. National Key Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, P.O. Box 8009-26, Beijing 100088, China3. Center for Applied Physics and Technology, MOE Key Center for High Energy Density Physics Simulations, College of Engineering, Peking University, Beijing 100871, China |
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| Abstract: | The two-dimensional Rayleigh–Taylor instability problem is simulated with a multiple-relaxation-time discrete Boltzmann model with a gravity term. Viscosity, heat conductivity, and Prandtl number effects are probed from macroscopic and nonequilibrium viewpoints. In the macro sense, both viscosity and heat conduction show a significant inhibitory effect in the reacceleration stage, which is mainly achieved by inhibiting the development of the Kelvin–Helmholtz instability. Before this, the Prandtl number effect is not sensitive. Viscosity, heat conductivity, and Prandtl number effects on nonequilibrium manifestations and the degree of correlation between the nonuniformity and the nonequilibrium strength in the complex flow are systematically investigated. |
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| Keywords: | discrete Boltzmann model/method multiple-relaxation-time Rayleigh–Taylor instability nonequilibrium |
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