NUMERICAL INVESTIGATION OF TSUNAMI WAVE GENERATION USING A PISTONTYPE WAVEMAKER

the displacement of a significant volume of water due to unrestricted seas, and most of its damage is due to a large flood and a lot of forces that inflict on the coastal bodies.Since many important facilities such as nuclear power plants, oil and gas storage tanks, ports, customs, steel plants and ... are installed on the shores, a study on thetsunami is doubly important. [1] In the past, the tsunami has been simulated as a solitary wave [2-4], however, recent research has shown that tsunami waves have a completely different behavior in spatial and temporal scales [5 ،6]. As a result, the tsunami profile generated using the solitary wave concept is different from reality. This difference is more apparent in coastal areas where the shoaling effect restrains the development of the tsunami wave. To overcome this problem, researchers used alternative methods such as Nshaped waves that combine multiple solitary waves. Chan and Liu[7], according to the recorded results from the Iwate Station in Japan Tsunami 2011, proposed a model ofthree sech2 (*) hyperbolic functions. In this research, a new method has been used to integrate the three Sech2 (*) hyperbolic functions to regenerate Tokyo Tsunami Profiling with the help of a piston wavemaker. The wave generated by this method is called tsunami-like .