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Alternative TitleInitial Application of Unequal Step Grid andExplicit Method in the Simulation of NonlinearPropagation of Gravity Wave
刘晓; 徐寄遥; 马瑞平; 北京8701信箱
Source Publication空间科学学报
Keyword重力波 紧致差分格式 非等间距网格 显式算法
Other AbstractAn unequal step grid and explicit numerical model is developed in this paper by using the 3rd order TVD e."cplicit time integration method, which is used to simulate the nonlinear propagation of the gravity wave in a 2-dimensional compressible atmosphere. The model can simulate the small-scale complex wave with high resolution while the computer cost doesn't increase.It can be used to simulate the nonlinear propagation of gravity waves breaking into small-scale complex wave from the middle-scale wave. The simulation results for the propagation of small amplitude gravity wave indicate that, the model can reproduce the propagation of small amplitude gravity wave and preserve the energy conservation relation and the phase difference between different perturbation variable.The numerical results coincide well with linear gravity wave theory.The simulation results for the nonlinear propagation of finite amplitude gravity wave show that, compared with the equal grid system with the same grid number, the unequal step grid system can simulate the evolution of gravity wave from instable to breakdown with higher resolution. The simulation results in the equal grid system with the grid numher increasing one time are same as that for the unequal grid system indicate that, the simulation results in the unequal grid system is correct, and the computer cost is saved greatly. The advantages of explicit method are also preserved in this model, such as, needn't iterative method to solve the solution and extend to 3-dimensional easily.
Indexed ByCSCD
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Cited Times:3[CSCD]   [CSCD Record]
Document Type期刊论文
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
刘晓,徐寄遥,马瑞平,等. 非等间距显式算法在重力波非线性传播数值模拟中的初步应用[J]. 空间科学学报,2007,27(2):132-139.
APA 刘晓,徐寄遥,马瑞平,&北京8701信箱.(2007).非等间距显式算法在重力波非线性传播数值模拟中的初步应用.空间科学学报,27(2),132-139.
MLA 刘晓,et al."非等间距显式算法在重力波非线性传播数值模拟中的初步应用".空间科学学报 27.2(2007):132-139.
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