WAVE PROPAGATION AT THE INTERFACE OF A TWO-LAYER FLUID SYSTEM IN THE LABORATORY

A series of laboratory experiments on internal solitary wave (ISW) had been conducted in a two-layer fluid system. Internal solitary waves were generated in laboratory which was controlled by several variables, including different layer thickness ratios H1/H2, interface differences ηo, and the density ratios ρ1/ρ2. The wave flume used in this experiment was 12 meter long with a cross-section 0.5 m wide by 0.7m in height. Five ultrasonic probes placed at equidistance recorded the interface fluctuations, and one density probe measured the change of density across the interface. Data collection and processing were carried out via control software. This paper presents the results of the physical properties related to propagation and dissipation of the ISW. It appears that the leading soliton feature occurred while layer thickness ratios |H1/H2| was large and the decaying ratio in energy and wave amplitude could be approximated by a linear regression trend with distance.

[1]  D. Cacchione,et al.  Incipient sediment movement by shoaling internal gravity waves , 1974 .

[2]  C. Koop,et al.  An investigation of internal solitary waves in a two-fluid system , 1981, Journal of Fluid Mechanics.

[3]  H. Segur,et al.  Soliton models of long internal waves , 1982, Journal of Fluid Mechanics.

[4]  D. Renouard,et al.  Internal solitons on the pycnocline: generation, propagation, and shoaling and breaking over a slope , 1985, Journal of Fluid Mechanics.

[5]  Frank Wessels,et al.  Interaction of Internal Waves with a Topographic Sill in a Two-Layered Fluid , 1996 .

[6]  Linear And Non-Linear Internal Tides Around the European Atlantic Shelf Edge , 1996 .

[7]  E. Barthélemy,et al.  Ultrasonic probes and data processing to study interfacial solitary waves , 1997 .

[8]  Hervé Michallet,et al.  Experimental study of interfacial solitary waves , 1998, Journal of Fluid Mechanics.

[9]  D. Bogucki,et al.  A mechanism for sediment resuspension by internal solitary waves , 1999 .

[10]  Chen-Yuan Chen,et al.  Laboratory Observations on Internal Solitary Wave Evolution over a Submarine Ridge , 2006 .

[11]  Chen-Yuan Chen,et al.  An investigation on internal solitary waves in a two-layer fluid: Propagation and reflection from steep slopes , 2007 .

[12]  Cheng-Wu Chen,et al.  GENERATION OF INTERNAL SOLITARY WAVE BY GRAVITY COLLAPSE , 2007 .

[13]  Chen-Yuan Chen,et al.  Laboratory observations on internal solitary wave evolution on steep and inverse uniform slopes , 2007 .