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SUMMARY:Interaction of wave with a body floating on a wide polynya - Guo X
 iong  Wu (University College London)
DTSTART:20171114T150000Z
DTEND:20171114T163000Z
UID:TALK95095@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:Guo Xiong Wu (University College London) Zhifu Li and Chunyan 
 Ji (Jiangsu University of Science and Technology)   A method based on wide
  spacing approximation is proposed for the interaction of water wave with 
 a body floating on a polynya. The ice sheet is modelled as an elastic plat
 e and fluid flow is described by the velocity potential theory. The soluti
 on procedure is constructed based on the assumption that when the distance
  between two disturbances to the free surface is sufficiently large\, the 
 interactions between them involve only the travelling waves caused by the 
 disturbances and the effect of the evanescent waves is ignored. The soluti
 on for the problem can then be obtained from those for a floating body wit
 hout ice sheet and for ice sheet/free surface without floating body. Both 
 latter solutions have already been found previously and therefore there wi
 ll be no additional effort in solution once the wide spacing approximation
  formulation is derived. Some explicit equations are derived to show zero 
 reflection by the polynya\, and peaks and troughs of the force and excited
  body motion. It is revealed that some of the peaks of the body motion are
  due to resonance while others are to the wave characters in the polynya. 
   Presentation will cover other aspects of wave/ice/body interaction\, inc
 luding a body submerged below an ice sheet with a crack and hybrid numeric
 al method.   <br><br><br>
LOCATION:Seminar Room 2\, Newton Institute
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