English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 78728/78728 (100%)
造訪人次 : 33558151      線上人數 : 1137
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋


    請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/27431


    題名: A study of secondary waves generated by wave-wave interaction in a wind field
    作者: Kuo,FS;Lo,CL;Lue,HY;Huang,CM
    貢獻者: 太空科學研究所
    關鍵詞: ATMOSPHERIC GRAVITY-WAVES;RESONANT INTERACTIONS;INTERNAL WAVES;SPECTRA
    日期: 1999
    上傳時間: 2010-06-29 18:38:22 (UTC+8)
    出版者: 中央大學
    摘要: Propagation of an atmospheric gravity wave (AGW) in a wind field is studied by numerical simulation. Two models are applied: the first is a linear model to check with the gravity wave theory; the second is a quasi-nonlinear model to study the characteristics of the secondary waves produced by the interactions between two gravity wave packets. The magnitudes and directions of the vertical phase and group velocities obtained by linear simulation are consistent with the prediction of linear gravity wave theory. That is, the vertical propagation velocities of the phase and the energy of an AGW are always opposite to each other. In the quasi-nonlinear model, two primary waves are forced to oscillate at the ground level with their group velocities upward and phase velocities downward, which creates two secondary waves by the interaction between the primary waves. The smaller one is found to have group velocity upward and phase velocity downward just the same as that of the two primary waves. The group velocity of the larger one is found to be downward always, while its phase velocity is upward when the primary waves in the source region are still oscillating and becomes downward after the primary waves stop oscillation. The result reveals that the smaller one is a production of a resonant interaction; while the larger one is the production of a non-resonant interaction. Both secondary waves do not follow the dispersion relation of the linear theory. The result of this simulation confirms our previous observation that the vertical phase and group velocities of a non-linear AGW are not necessarily in the opposite direction.
    關聯: CHINESE JOURNAL OF PHYSICS
    顯示於類別:[太空科學研究所 ] 期刊論文

    文件中的檔案:

    檔案 描述 大小格式瀏覽次數
    index.html0KbHTML457檢視/開啟


    在NCUIR中所有的資料項目都受到原著作權保護.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 隱私權政策聲明