کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4992357 1457263 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A laboratory study of floating lenticular anticyclones
ترجمه فارسی عنوان
مطالعه آزمایشگاهی ضد سکته مغزی شناور
کلمات کلیدی
جادوها، لنز اقیانوسی، تعادل ژئواستروفی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی

Oceanic vortices play an important role in the redistribution of heat, salt and momentum in the oceans. Among these vortices, floating lenses or rings are often met in the meanders of warm currents. In order to better describe these vortices, we propose here a laboratory study of floating anticyclonic lenses. A small volume of fresh water is gently injected near the surface of a rotating layer of homogeneous salted water. Because of the opposite effects of rotation that tends to generate columnar structures and density stratification that spreads light water on the surface, the vortices take after a rapid transient, a quasi-stationary lenticular, finite-sized three dimensional typical shape given by the hydrostatic and geostrophic balances. Visualization and measurements of this equilibrium shape, aspect ratios and vorticity fields are performed. These measurements permit to compare our laboratory anticyclones to analytical predictions that use first a simple solid body rotation model and then a more realistic isolated Gaussian vorticity field. Finally, a comparison of our models with oceanographic lenses described in the literature is discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Mechanics - B/Fluids - Volume 61, Part 1, January–February 2017, Pages 1-8
نویسندگان
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