HR: 13:40h
AN: OS53B-01    [Abstracts]
TI: Modelling non-hydrostatic processes in sill regions
AU: Souza, A
EM: ajso@pol.ac.uk
AF: POL, 6 Brownlow Street, Liverpool, L3 5DA, United Kingdom
AU: * Xing, J
EM: jxx@pol.ac.uk
AF: POL, 6 Brownlow Street, Liverpool, L3 5DA, United Kingdom
AU: Davies, A
EM: amd@pol.ac.uk
AF: POL, 6 Brownlow Street, Liverpool, L3 5DA, United Kingdom
AU: Berntsen, J
EM: jarle.berntsen@math.uib.no
AF: University of Bergen, Johannes Brunsgate 12, Bergen, N5008, Norway
AB: We use a non-hydrostatic model to compute tidally induced flow and mixing in the region of bottom topography representing the sill at the entrance to Loch Etive (Scotland). This site is chosen since detailed measurements were recently made there. With non-hydrostatic dynamics in the model our results showed that the model could reproduce the observed flow characteristics, e.g., hydraulic transition, flow separation and internal waves. However, when calculations were performed using the model in the hydrostatic form, significant artificial convective mixing occurred. This influenced the computed temperature and flow field. We will discuss in detail the effects of non-hydrostatic dynamics on flow over the sill, especially investigate non-linear and non-hydrostatic contributions to modelled internal waves and internal wave energy fluxes.
DE: 4534 Hydrodynamic modeling
DE: 4544 Internal and inertial waves
DE: 4562 Topographic/bathymetric interactions
SC: Ocean Sciences [OS]
MN: 2007 Fall Meeting