McDonald, NR;
Johnson, ER;
(2009)
Gap-Leaping Vortical Currents.
Journal of Physical Oceanography
, 39
(10)
2665 - 2674.
10.1175/2009JPO4191.1.
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Abstract
A one-parameter family of exact solutions describing the bifurcation of a steady two-dimensional current with uniform vorticity near a gap in a thin barrier is found. The unsteady evolution of source-driven flows toward these steady states is studied using a version of contour dynamics, appropriately modified to take into account the presence of a barrier with a single gap. It is shown that some of the steady solutions are realizable as large-time limits of the source-driven flows, although some are not owing to persistent eddy-shedding events in the vicinity of the gap. For the special case when there is zero net flux through the gap, numerical experiments show that the through-gap flux of vortical fluid increases with the width of the gap and that this flux approaches a steady limit with time.
| Type: | Article |
|---|---|
| Title: | Gap-Leaping Vortical Currents |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1175/2009JPO4191.1 |
| Publisher version: | http://dx.doi.org/10.1175/2009JPO4191.1 |
| Language: | English |
| Additional information: | © Copyright 2009 American Meteorological Society |
| Keywords: | WESTERN BOUNDARY CURRENT, POTENTIAL VORTICITY, COASTAL CURRENTS, UNIMAK PASS, FLOW, DYNAMICS, MOTION, VORTEX, TOPOGRAPHY, BARRIERS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Mathematics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/96866 |
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