GENERATION OF INTERNAL SOLITARY WAVE BY GRAVITY COLLAPSE

Authors

Chen-Yuan Chen, Department of Management Information System, Yung-Ta Institute of Technology and Commerce, Ping-Tung County, Taiwan 90941, R.O.C.
John Rong-Chung Hsu, Department of Marine Environment and Engineering, National Sun YatSen University, Kaohsiung, Taiwan 80424, R.O.C. NCKU-NSYSU Research Center for Ocean Environment and Technology, Taiwan; Honorary Research Fellow, School of Civil and Resource Engineering, University of Western Australia, WA 6009, Australia.
Cheng-Wu Chen, Department of Logistics Management, Shu-Te University, Kaohsiung County, Taiwan 82445, R.O.C.Follow
Hsin-Hsun Chen, Graduation from Institute of Physical Oceanography, National Sun Yat-Sen University, Kaohsiung, Taiwan 80424, R.O.C.
Ching-Feng Kuo, Department of Color Filter Inspection, Chi Mei Optoelectronics, Tainan County, Taiwan, R.O.C.
Min-Hung Cheng, Department of Marine Environment and Engineering, National Sun YatSen University, Kaohsiung, Taiwan 80424, R.O.C.

Abstract

Laboratory experiments were conducted to investigate the generation of an internal solitary wave (ISW) in a two-layer free surface fluid system in wave flume (12 m × 0.5 m × 0.7 m), which included wave channel and compartment. There is filled with stratified twolayer fluid system in the channel and small compartment, respectively. These two regions in the wave flume are separated by a movable vertical gate at one end of the flume for generating the ISW (internal solitary wave). An ISW generation is thus caused by gravity collapse upon raising the vertical gate. Given positive potential energies, an elevation-type ISW is followed by an anticlockwise overturning motion at the interface; on the other hand, an ISW of depression-type was generated by clockwise motion. This paper presented physical properties related to wave generation in a stratified fluid in laboratory. In the wave flume, the stable wave propagation, either elevation-type or depression-type ISW, is influenced by environmental condition. An ISW of depression transferred into unstable fluctuation instead of soliton feature whilst the upper layer thickness is greater than the lower layer thickness. Similarly, an ISW of elevation reduces its wave amplitude and causes trailing oscillation followed with the leading wave.

Recommended Citation

Chen, Chen-Yuan; Hsu, John Rong-Chung; Chen, Cheng-Wu; Chen, Hsin-Hsun; Kuo, Ching-Feng; and Cheng, Min-Hung (2007) "GENERATION OF INTERNAL SOLITARY WAVE BY GRAVITY COLLAPSE," Journal of Marine Science and Technology: Vol. 15: Iss. 1, Article 1.
DOI: 10.51400/2709-6998.2026
Available at: https://jmstt.ntou.edu.tw/journal/vol15/iss1/1