BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Experimental validations of various aspects of the wave-induced me
 an flow for surface gravity wave groups - Ton van den Bremer (University o
 f Edinburgh)
DTSTART:20170810T150000Z
DTEND:20170810T160000Z
UID:TALK75371@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:For surface gravity wave groups\, the well-known Stokes drift 
 and transport are complemented by a set-down (or set-up) of the free surfa
 ce and an Eulerian return flow first described by Longuet-Higgins and Stew
 art (1962). We present experimental validation of these classical second-o
 rder theoretical predictions for uni-directional wave groups in a laborato
 ry flume at the University of Plymouth COAST-lab and for directionally spr
 ead wave groups in the University of Edinburgh FloWave facility. Firstly\,
  we present detailed PTV (particle tracking  velocimetry) measurements of 
 the Lagrangian transport and trajectories of near-neutrally buoyant partic
 les underneath two-dimensional surface gravity wave groups in a laboratory
  flume. By focussing our attention on wave groups of moderate steepness\, 
 we confirm the predictions of standard second-order multi-chromatic wave t
 heory\, in which the body of fluid satisfies the potential flow equations.
  Particles near the surface are transported forwards and their motion is d
 ominated by Stokes drift.   Particles at sufficient depth are transported 
 backwards by the Eulerian return current. Secondly\, we present detailed m
 easurements of the surface elevation of the second-order long bound-waves 
 in directionally spread groups. We demonstrate that the set-down becomes a
  set-up for sufficiently large degrees of directional spreading using meas
 urements in the newly built FloWave facility.
LOCATION:Seminar Room 1\, Newton Institute
END:VEVENT
END:VCALENDAR