Numerical studies of large-amplitude internal waves shoaling and breaking at shelf slopes |
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| Authors: | Øyvind Thiem Jarle Berntsen |
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| Institution: | 1.The Bergen Center for Computational Science,Unifob,Bergen,Norway;2.Department of Mathematics,University of Bergen,Bergen,Norway |
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| Abstract: | Hydro carbon fields beyond the shelf break are presently being explored and developed, which has increased the scientific
focus in this area. Measurements from the slopes reveal large variability in temperature and velocity, and some of the observed
events are due to interactions between large-amplitude oscillations of the thermocline and the topography. The present study
focuses on the strong currents that are generated near the seabed during shoaling and breaking of internal waves along shelf
slopes. The parameter regime used is similar to the one for the Nordic Seas. The results show that, during shoaling of large
internal waves along (gentle) slopes, the energy is transferred towards smaller scales and strong velocities (over 1 m s − 1) can be generated. To resolve all scales involved is still not feasible, and therefore, the model results are sensitive to
the grid size and the subgrid scale closure. |
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