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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">hydrophysics</journal-id><journal-title-group><journal-title xml:lang="ru">Фундаментальная и прикладная гидрофизика</journal-title><trans-title-group xml:lang="en"><trans-title>Fundamental and Applied Hydrophysics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-6673</issn><issn pub-type="epub">2782-5221</issn><publisher><publisher-name>St. Petersburg Research Center of the Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.7868/S2073667320040036</article-id><article-id custom-type="elpub" pub-id-type="custom">hydrophysics-121</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ВЗАИМОДЕЙСТВИЕ МОРСКИХ ОБЪЕКТОВ, ОКЕАНА И АТМОСФЕРЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>INTERACTION OF MARINE OBJECTS*, OCEAN‏ AND ‏ATMOSPHERE</subject></subj-group></article-categories><title-group><article-title>Численное исследование закономерностей генерации субмезомасштабных возмущений при обтекании элементов подводного рельефа</article-title><trans-title-group xml:lang="en"><trans-title>Numerical Study of Submesoscale Features Generation Patterns Within Flow Around Elements of Underwater Terrain</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ванкевич</surname><given-names>Р. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Vankevich</surname><given-names>R. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>117997, Нахимовский пр., д. 36, г. Москва</p></bio><bio xml:lang="en"><p>117997, Nahimovsky Pr., 36, Moscow</p></bio><email xlink:type="simple">rvankevich@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Родионов</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Rodionov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>117997, Нахимовский пр., д. 36, г. Москва</p><p>199034, Университетская наб., д. 5, г. Санкт-Петербург</p></bio><bio xml:lang="en"><p>117997, Nahimovsky Pr., 36, Moscow</p><p>199034, Universitetskaya Emb., 5, St. Petersburg</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт океанологии им. П.П. Ширшова РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Shirshov Institute of Oceanology RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт океанологии им. П.П. Ширшова РАН; Санкт-Петербургский научный центр РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Shirshov Institute of Oceanology RAS; St. Petersburg Research Center RAS</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>03</day><month>12</month><year>2021</year></pub-date><volume>13</volume><issue>4</issue><fpage>27</fpage><lpage>38</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ванкевич Р.Е., Родионов А.А., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Ванкевич Р.Е., Родионов А.А.</copyright-holder><copyright-holder xml:lang="en">Vankevich R.E., Rodionov A.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://hydrophysics.spbrc.ru/jour/article/view/121">https://hydrophysics.spbrc.ru/jour/article/view/121</self-uri><abstract><p>В статье методом математического моделирования исследуются характеристики и механизмы формирования возмущений волновой и вихревой природы при обтекании препятствий в области наблюдения субмезомасштабных явлений в натурных условиях. Решается задача обтекания преграды в виде полусферы диаметром 20 м с основанием на дне двухслойным низкотурбулентным потоком вязкой несжимаемой жидкости. Вихревая динамика потока за преградой разрешалась явным образом с использованием гибридного метода отсоединенных вихрей. На основе численных экспериментов показано, что в исследованном диапазоне чисел Фруда 0.0017–0.0272 процесс обтекания является нестационарным с образованием когерентных вихревых структур, которые растут с течением времени и вниз по потоку до характерных масштабов препятствия, а затем передают энергию волновым компонентам.</p></abstract><trans-abstract xml:lang="en"><p>The article shows a mathematical model to study the characteristics and mechanisms of formation of wave and vortex structures formed by the flow around the obstacle at the scales corresponding to submesoscale phenomena in natural conditions. The problem of flow around a barrier in the form of a hemisphere with a diameter of 20 m with a base at the bottom of a two-layer laminar flow of a viscous incompressible liquid is solved. The vortex dynamics of the flow behind the barrier was resolved explicitly using the hybrid method of detached eddies. Based on numerical experiments, it is shown that in the studied range of Froude number 0.0017–0.0272 the flow process is non-stationary with the formation of coherent vortex structures that grow over time and down the stream to the characteristic scales of the obstacle, and then transfer energy to the wave components.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>субмезомасштабные структуры</kwd><kwd>когерентные вихри</kwd><kwd>внутренние волны</kwd><kwd>численный эксперимент</kwd><kwd>уравнение Навье-Стокса</kwd></kwd-group><kwd-group xml:lang="en"><kwd>large vortex structures</kwd><kwd>coherent vortices</kwd><kwd>internal waves</kwd><kwd>numerical experiment</kwd><kwd>Navier-Stokes equation</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания по темам № 0149–2019–0015 (Р.Е Ванкевич, А.А. Родионов) и № 075–01336–20–02 (А.А. 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