Experimental investigation of internal tide generation by two-dimensional topography using synthetic Schlieren
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2007
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| Online Access: | http://hdl.handle.net/1721.1/36242 |
| _version_ | 1826192251383971840 |
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| author | Echeverri Mondragón, Paula |
| author2 | Thomas Peacock. |
| author_facet | Thomas Peacock. Echeverri Mondragón, Paula |
| author_sort | Echeverri Mondragón, Paula |
| collection | MIT |
| description | Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006. |
| first_indexed | 2024-09-23T09:08:41Z |
| format | Thesis |
| id | mit-1721.1/36242 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T09:08:41Z |
| publishDate | 2007 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/362422019-04-10T20:59:58Z Experimental investigation of internal tide generation by two-dimensional topography using synthetic Schlieren Echeverri Mondragón, Paula Thomas Peacock. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Mechanical Engineering. Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006. Includes bibliographical references (leaves 78-81). An experimental investigation of internal tide generation at two-dimensional topography was carried out using the synthetic Schlieren experimental technique. Two linear models were tested: Balmforth, Ierley and Young's [1] subcritical solution for a Gaussian ridge and Hurley and Keady's [15] super-critical solution for a knife-edge. The former was modified to account for the effects of viscosity in the propagating wave beams. The experiment set up comprised a wave-tank with a linear salt-water stratification and a sliding stage on which the topography oscillated horizontally to simulate tidal flow. The wave field was measured by capturing the distortion of a pattern of random dots placed on a light sheet behind the tank using a CCD camera, and using the synthetic Schlieren processing of the movies obtained. Four experiments were performed, for wave beams propagating close to 25 ° and 56 from the horizontal for each topographic feature. The subcritical theory over-predicted the peak disturbance over the Gaussian ridge by a maximum of 50%, and it correctly predicted the profile shape and evolution along the wave beam and throughout one period of the oscillation. (cont.) The supercritical knife-edge theory predicted the disturbance amplitude, shape and evolution within experimental error. The results showed that at Reynolds numbers below 0(105), viscosity suppresses nonlinear effects and smoothes out instabilities predicted by inviscid models that would lead to overturning. These experiments have motivated the construction of a larger wave-tank to achieve higher Reynolds numbers. Future experiments will investigate nonlinear internal tide generation, overturning and mixing in unstable wave beams and flow separation over topography. by Paula Echeverri Mondragón. S.M. 2007-02-21T13:13:27Z 2007-02-21T13:13:27Z 2006 2006 Thesis http://hdl.handle.net/1721.1/36242 77234378 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 81 leaves application/pdf Massachusetts Institute of Technology |
| spellingShingle | Mechanical Engineering. Echeverri Mondragón, Paula Experimental investigation of internal tide generation by two-dimensional topography using synthetic Schlieren |
| title | Experimental investigation of internal tide generation by two-dimensional topography using synthetic Schlieren |
| title_full | Experimental investigation of internal tide generation by two-dimensional topography using synthetic Schlieren |
| title_fullStr | Experimental investigation of internal tide generation by two-dimensional topography using synthetic Schlieren |
| title_full_unstemmed | Experimental investigation of internal tide generation by two-dimensional topography using synthetic Schlieren |
| title_short | Experimental investigation of internal tide generation by two-dimensional topography using synthetic Schlieren |
| title_sort | experimental investigation of internal tide generation by two dimensional topography using synthetic schlieren |
| topic | Mechanical Engineering. |
| url | http://hdl.handle.net/1721.1/36242 |
| work_keys_str_mv | AT echeverrimondragonpaula experimentalinvestigationofinternaltidegenerationbytwodimensionaltopographyusingsyntheticschlieren |