Mixing in gravity currents
Event details
| Date | 21.11.2013 |
| Hour | 12:15 › 13:15 |
| Speaker | Prof. Claudia Adduce |
| Location |
GC B331
|
| Category | Conferences - Seminars |
Gravity currents are flows driven by a density difference mainly in the horizontal direction. The agents causing the density difference include temperature differentials, dissolved and suspended materials. Laboratory experiments and numerical simulations of gravity currents are performed. Experiments investigating mixing in a density-driven current flowing down a sloping bottom, in a rotating homogenous fluid are discussed. A systematic study spanning a wide range of Froude and Reynolds numbers is conducted and different flow regimes are observed. The entrainment parameter is found to be dependent not only on Fr, as assumed in previous studies, but also on Re. Several experiments simulating unsteady gravity currents moving on flat and up-sloping beds are performed. A two-layer shallow water model accounting for the entrainment and simulating unsteady gravity currents is developed. The developed shallow-water models with and without entrainment are also compared, showing a better agreement when mixing is accounted for. Laboratory experiments and shallow model simulations are in good agreement.
Bio: Claudia Adduce is Assistant Professor with tenure at the Department of Engineering of the University Roma Tre, Italy. She completed her PhD at the University Roma Tre and she worked at the Department of Physical Oceanography of Woods Hole Oceanographic Institution (USA). She is Professor of Environmental Hydraulics for Civil Engineers at the University Roma Tre. Her research focuses on: mixing due to gravity currents, eddies interaction with seamounts and islands, local scouring downstream of hydraulic structures, sloshing of stratified fluids.
Bio: Claudia Adduce is Assistant Professor with tenure at the Department of Engineering of the University Roma Tre, Italy. She completed her PhD at the University Roma Tre and she worked at the Department of Physical Oceanography of Woods Hole Oceanographic Institution (USA). She is Professor of Environmental Hydraulics for Civil Engineers at the University Roma Tre. Her research focuses on: mixing due to gravity currents, eddies interaction with seamounts and islands, local scouring downstream of hydraulic structures, sloshing of stratified fluids.
Practical information
- General public
- Free
Organizer
- Prof. Nikolas Geroliminis & Prof. Katrin Beyer
Contact
- Prof. Anton Schleiss