Tomographic reconstruction of internal wave patterns in a paraboloid |
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| Authors: | Jeroen Hazewinkel Stuart B Dalziel |
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| Institution: | (1) Royal Netherlands Institute for Sea Research, P.O. Box 59, 1790 AB Texel, The Netherlands;(2) Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Wilberforce Road, Cambridge, CB3 0WA, UK;(3) Centrum Wiskunde & Informatica, P.O. Box 94079, 1090 GB Amsterdam, The Netherlands;(4) Institute for Marine and Atmospheric Research Utrecht, University Utrecht, Princetonplein 5, 3584 CC Utrecht, The Netherlands;(5) Scripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0209, USA |
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| Abstract: | Using tomographic synthetic schlieren, we are able to reconstruct the three-dimensional density field of internal waves. In
this study, the waves are radiating from an oscillating sphere positioned eccentrically at the surface of a paraboloidal domain
filled with a uniformly stratified fluid. We find that the prediction by ray tracing corresponds well with the observed intensities
of the wave field. Remarkably, for a specific value of the forcing frequency, we observe convergence of internal wave energy
to an internal wave attractor. The attractor is found to dominate fluid motion in the plane perpendicular to the plane spanned
by the symmetry axis and the oscillator position. |
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