| A numerical simulation of nonlinear propagation of gravity wave packet in three-dimension compressible atmosphere |
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| 作者姓名： | 吴少平 易帆 |
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| 作者单位： | WU Shaoping & Yl Fan1. Wuhan Institute of Physics and Mathematics，Chinese Academy of Sciences，Wuhan 430071，China;2. Department of Radio Science and Technology，Wuhan University，Wuhan 430072，China;3. Department of Physics，Huazhong Normal |
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| 摘 要： | By using FICE scheme, a numerical simulation of nonlinear propagation of gravity wave packet in three-dimension compressible atmosphere is presented. The whole nonlinear propagation process of the gravity wave packet is shown; the basic characteristics of nonlinear propagation and the influence of the ambient winds on the propagation are analyzed. The results show that FICE scheme can be extended in three-dimension by which the calculation is steady and kept for a long time; the increase of wave amplitude is faster than the exponential increase according to the linear gravity theory; nonlinear propagation makes the horizontal perturbation velocity increase greatly which can lead to enhancement of the local ambient winds; the propagation path and the propagation velocity of energy are different from the results expected by the linear gravity waves theory, the nonlinearity causes the change in propagation characteristics of gravity wave; the ambient winds alter the propagation path and group velocity of gr
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A numerical simulation of nonlinear propagation of gravity wave packet in three-dimension compressible atmosphere |
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| Shaoping Wu and Yi Fan.A numerical simulation of nonlinear propagation of gravity wave packet in three-dimension compressible atmosphere[J].Science in China(Technological Sciences),2002,45(3):306-313. |
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| Authors: | Shaoping Wu and Yi Fan |
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| Affiliation: | 1. Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;Department of Physics, Huazhong Normal University, Wuhan 430079, China
2. Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;Department of Radio Science and Technology, Wuhan University, Wuhan 430072, China |
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| Abstract: | By using FICE scheme, a numerical simulation of nonlinear propagation of gravity wave packet in three-dimension compressible atmosphere is presented. The whole nonlinear propagation process of the gravity wave packet is shown; the basic characteristics of nonlinear propagation and the influence of the ambient winds on the propagation are analyzed. The results show that FICE scheme can be extended in three-dimension by which the calculation is steady and kept for a long time; the increase of wave amplitude is faster than the exponential increase according to the linear gravity theory; nonlinear propagation makes the horizontal perturbation velocity increase greatly which can lead to enhancement of the local ambient winds; the propagation path and the propagation velocity of energy are different from the results expected by the linear gravity waves theory, the nonlinearity causes the change in propagation characteristics of gravity wave; the ambient winds alter the propagation path and group velocity of gravity wave. |
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| Keywords: | gravity wave nonlinearity FICE scheme simulation |
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