BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Hybrid numerical-asymptotic boundary element methods for high freq
 uency scattering by multiple obstacles - Stephen Langdon (Brunel Universit
 y)
DTSTART:20230421T104500Z
DTEND:20230421T113000Z
UID:TALK198769@talks.cam.ac.uk
DESCRIPTION:Standard Boundary Element Methods (BEM) for linear wave scatte
 ring problems\, with piecewise polynomial approximation spaces\, can be pr
 ohibitively expensive when the wavelength of the scattered wave is small c
 ompared to typical lengthscales of the scatterer\, due to rapid oscillatio
 ns in the solution. Hybrid Numerical-Asymptotic (HNA) BEMs\, with enriched
  approximation spaces consisting of the products of piecewise polynomials 
 with carefully chosen oscillatory basis functions\, have been shown to be 
 effective in overcoming this limitation for a range of problems\, mostly f
 ocused on single convex scatterers or very specific non-convex or multiple
  scattering configurations. In this talk\, we review progress on the exten
 sion of the HNABEM approach to multiple scattering problems\, and propose 
 a novel approach to the problem of two-dimensional scattering by a pair of
  screens\, which we anticipate may serve as a building block towards algor
 ithms for more general high frequency multiple scattering problems.
LOCATION:Seminar Room 1\, Newton Institute
END:VEVENT
END:VCALENDAR