The Characteristic Of Internal Cnoidal Wave And Its Interaction With Structures

The displacement characteristic of adjacent coastal internal wave can be studied soundly by means of internal cnoidal wave variations, which has been regarded as an important research subject on coastal engineering. In this study, the analytic solution of internal cnoidal wave is derived from the KdV equation firstly. On the basis of feature analysis, the internal cnoidal wave is converted to liner internal wave or internal solitary when k=0 and k=1 by using mathematical manipulations. Moreover, the waves are generated by push-pedal method and the free surface is captured by VOF method. The internal conidal wave is thus simulated with FLUET, and the wave shapes with different amplitudes and different periods are compared. The wave with specific period and amplitude is chosen for the numerical simulation of the interaction between internal conidal wave and different kinds of cylinders in 3-Dimension. The inertia force and the viscous force on the cylinders are obtained and the total wave force are comparied.