BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//talks.cam.ac.uk//v3//EN
BEGIN:VTIMEZONE
TZID:Europe/London
BEGIN:DAYLIGHT
TZOFFSETFROM:+0000
TZOFFSETTO:+0100
TZNAME:BST
DTSTART:19700329T010000
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0100
TZOFFSETTO:+0000
TZNAME:GMT
DTSTART:19701025T020000
RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
CATEGORIES:Isaac Newton Institute Seminar Series
SUMMARY:High-frequency scattering by spheres and cylinders
- Chris Linton (Loughborough University)
DTSTART;TZID=Europe/London:20230208T110000
DTEND;TZID=Europe/London:20230208T114500
UID:TALK194779AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/194779
DESCRIPTION:Electromagnetic scattering by a penetrable sphere
is the canonical problem that lies at the heart of
theories of the rainbow. It is relatively straigh
tforward to solve this problem via separation of v
ariables (often referred to as Mie theory in this
context). This leads to a series which converges f
or all frequencies but which becomes computational
ly ineffective at high frequencies. As a consequen
ce\, there have been extensive attempts over the y
ears to derive asymptotic solutions in the high-fr
equency regime and this has been very successful i
n improving our understanding of the complex pheno
mena which this physical problem exhibits. The cha
llenge remains to extract all the phenomena direct
from the Mie solution and to use the Mie solution
to devise a numerical scheme that can compute the
solution to arbitrary accuracy for high frequenci
es. The starting point for such an approach is the
Watson transform. With this in mind\, this talk w
ill focus on perhaps the simplest relevant canonic
al problem\, namely acoustic scattering by a circu
lar cylinder with Dirichlet boundary conditions an
d describe what the challenges are to achieving th
e goal of a solution which is valid everywhere in
the fluid domain and which can be used to compute
that solution efficiently at high frequencies.
LOCATION:Seminar Room 1\, Newton Institute
CONTACT:
END:VEVENT
END:VCALENDAR