Drag increment due to internal waves generated by Rankine ovoid

查看全文 作　　者：XU Zhaoting, ZHOU Xiwu and CHEN Xu(1. Institute of Physical Oceanography and Physical Oceanography Laboratory, Ocean University of Qingdao, Qingdao 266003, China;2. Key Laboratory of Marine Science and Numerical Modeling of State Oceanic Administration, Qingdao 266061, China)

出　　处：《Progress in Natural Science:Materials International》索引2002年第12卷第11期,共5页

基　　金：the National Natural Science Foundation of China (Grant No. 49776284); The Research Fund for the Doctoral Program of Higher Education (No.2000042309) ; 99JS21.6.1.JW1002 摘　　要：The experimental results on drag increment caused by internal waves, which are generated by a Rankine ovoid towed horizontally at constant velocities in a two-layer stratified water (a strong pycnocline) initially at rest, are presented. The drag increment due to stratification is obtained experimentally as a function of internal Froude number Frd and Reynolds number Re. From the results, it is shown that as a function of Frd or Re, an increment in mean drag coefficient due to stratification ΔCd has both increasing and decreasing region attributable respectively to internal wave and to collapse of mixing fluids in the wakes. A most significant result shows that when Frd=0.838 there exists a maximum of ΔCd, which is equal to 0.05 in the exciting region of the strong internal wave generation. 关键词：INTERNAL wave, wake, STRATIFIED flow, drag increment.

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Drag increment due to internal waves generated by Rankine ovoid

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