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SUMMARY:Mixing in gravity currents
DTSTART:20131121T121500
DTEND:20131121T131500
DTSTAMP:20260407T012228Z
UID:b92cd9e1f610bea5194a1728a5edf7aeb983ddacfc1524edb2c406a6
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Claudia Adduce\nGravity currents are flows driven by a d
 ensity difference mainly in the horizontal direction. The agents causing t
 he density difference include temperature differentials\, dissolved and su
 spended materials. Laboratory experiments and numerical simulations of gra
 vity currents are performed. Experiments investigating mixing in a density
 -driven current flowing down a sloping bottom\, in a rotating homogenous f
 luid are discussed. A systematic study spanning a wide range of Froude and
  Reynolds numbers is conducted and different flow regimes are observed. Th
 e entrainment parameter is found to be dependent not only on Fr\, as assum
 ed in previous studies\, but also on Re. Several experiments simulating un
 steady gravity currents moving on flat and up-sloping beds are performed. 
 A two-layer shallow water model accounting for the entrainment and simulat
 ing unsteady gravity currents is developed. The developed shallow-water mo
 dels with and without entrainment are also compared\, showing a better agr
 eement when mixing is accounted for. Laboratory experiments and shallow mo
 del simulations are in good agreement.\nBio: Claudia Adduce is Assistant P
 rofessor with tenure at the Department of Engineering of the University Ro
 ma Tre\, Italy. She completed her PhD at the University Roma Tre and she w
 orked at the Department of Physical Oceanography of Woods Hole Oceanograph
 ic Institution (USA). She is Professor of Environmental Hydraulics for Civ
 il Engineers at the University Roma Tre. Her research focuses on: mixing d
 ue to gravity currents\, eddies interaction with seamounts and islands\, l
 ocal scouring downstream of hydraulic structures\, sloshing of stratified 
 fluids.
LOCATION:GC B331
STATUS:CONFIRMED
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