Speaker 1 :  Taro Kakinuma  (Kagoshima University)
    Date & Time : February 18th (Fri.), 2022 / 10:00-10:40PM (Tokyo (JST)) 
    Title : Numerical solutions for the coexisting fields of surface and internal solitary waves
    Abstract : 
         The numerical solutions for the coexisting fields of surface and internal solitary waves 
       were obtained, where the set of nonlinear equations based on the variational principle for 
       steady waves were solved using the Newton-Raphson method. The relative phase velocity of 
       surface-mode solitary waves was slower in the coexisting fields of surface and internal 
       solitary waves than in the corresponding fields without the coexistence of internal waves. 
       The relative phase velocity of internal-mode solitary waves was also slower in the coexisting 
       fields of surface and internal solitary waves than in the corresponding cases without surface 
       waves. The interfacial position of an internal-mode internal solitary wave in a coexisting 
       field of surface and internal waves can exceed the critical level determined in the corresponding 
       case without a surface wave. The wave height ratio between internal-mode surface and internal 
       solitary waves decreased, as the relative wave height of internal-mode internal solitary waves 
       was increased.