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SUMMARY:Plate arrays as water wave metamaterials - Richard Porter (Univers
 ity of Bristol)
DTSTART:20210302T113000Z
DTEND:20210302T123000Z
UID:TALK156481@talks.cam.ac.uk
CONTACT:Georg Maierhofer
DESCRIPTION:This talk is intended to highlight the different effects that 
 plate arrays (closely-spaced periodic arrays of thin vertical plates) have
  on the propagation of surface water waves. It will focus on examples of p
 late arrays in a number of settings some of which will have analogues in t
 wo-dimensional acoustics or electromagnetics. We will start by showing how
  plate arrays extending through the fluid depth can be used as an all-freq
 uency perfectly-transmitting negative refraction medium. When dissipation 
 is added to the fluid motion in the gaps between the plates the arrays can
  act as wave absorbers. We shall show examples of the broadbanded absorpti
 on when plate arrays are used in cavities in plane walls and in waveguides
 . We shall also demonstrate the remarkable potential for ocean wave energy
  absorption by cylindrical plate array structures. Finally we describe how
  fully submerged bathymetric plate arrays can be used a devices for creati
 ng anisotropic depth effects which can be applied for the bespoke steering
  of water waves.
LOCATION:Microsoft Teams 
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