Sat, 21 Jan 2017

13:00 - 18:00
L4

Applied Mathematics Open Day

Graduate Students CANCELLED
(Mathematics Institute)
Abstract

In Your Third Year & want to find out about opportunities for

summer placements and future graduate study?

Why not visit Oxford and hear from graduate students about their research

TALKS ON

Dynamics of jumping elastic toys

Vertex models in developmental biology

Modelling of glass sheets

Glimpse into the mathematics of information

Network analysis of consumer data

Complex singularities in jet and splash flows

Complementary Lunch & Drinks Reception - TRAVEL BURSARIES AVAILABLE (up to £50)

 

Please RSVP to @email

Tue, 15 Oct 2013

14:00 - 14:30
L5

Hybrid numerical-asymptotic methods for wave scattering problems

David Hewett
(Mathematics Institute)
Abstract

Linear wave scattering problems (e.g. for acoustic, electromagnetic and elastic waves) are ubiquitous in science and engineering applications. However, conventional numerical methods for such problems (e.g. FEM or BEM with piecewise polynomial basis functions) are prohibitively expensive when the wavelength of scattered wave is small compared to typical lengthscales of the scatterer (the so-called "high frequency" regime). This is because the solution possesses rapid oscillations which are expensive to capture using conventional approximation spaces. In this talk I will outline some of my recent work in the development of "hybrid numerical-asymptotic" methods, which incur significantly reduced computational cost. These methods use approximation spaces containing oscillatory basis functions, carefully chosen to capture the high frequency asymptotic behaviour. In particular I will discuss some of the interesting challenges arising from non convex, penetrable and three-dimensional scatterers.

Subscribe to Mathematics Institute