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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">10.59887/fpg/kx4r-pr4d-fba8</article-id><article-id custom-type="elpub" pub-id-type="custom">hydrophysics-693</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>Исследование влияния численного метода и сеточных параметров на точность моделирования свободных колебаний цилиндра на водной поверхности</article-title><trans-title-group xml:lang="en"><trans-title>The Influence of Numerical Method and Grid Parameters on the Simulation Accuracy of Damped Oscillations of Free Floating Cylinder</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>Плыгунова</surname><given-names>К. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Plygunova</surname><given-names>K. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>607188, пр. Мира, д. 37, г. Саров, Нижегородская обл.</p></bio><bio xml:lang="en"><p>607188, pr. Mira, 37, Sarov, Nizhny Novgorod Region</p></bio><email xlink:type="simple">xenia28_94@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>Козелков</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kozelkov</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>607188, пр. Мира, д. 37, г. Саров, Нижегородская обл.</p><p>603950, ул. Минина, д. 24, г. Нижний Новгород</p></bio><bio xml:lang="en"><p>607188, pr. Mira, 37, Sarov, Nizhny Novgorod Region</p><p>603950, Minin Str., 24, Nizhny Novgorod</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Стрелец</surname><given-names>Д. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Strelets</surname><given-names>D. Y.</given-names></name></name-alternatives><bio xml:lang="ru"><p>125993, Волоколамское ш., д. 4, г. Москва</p></bio><bio xml:lang="en"><p>125993, Volokolamskoe Shosse, 4, Moscow</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Уткин</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Utkin</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>607188, пр. Мира, д. 37, г. Саров, Нижегородская обл.</p></bio><bio xml:lang="en"><p>607188, pr. Mira, 37, Sarov, Nizhny Novgorod Region</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Курулин</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kurulin</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>607188, пр. Мира, д. 37, г. Саров, Нижегородская обл.</p></bio><bio xml:lang="en"><p>607188, pr. Mira, 37, Sarov, Nizhny Novgorod Region</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Российский Федеральный Ядерный Центр — Всероссийский научно-исследовательский институт экспериментальной физики</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Federal Nuclear Center — The All-Russian Research Institute of Experimental Physics</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Российский Федеральный Ядерный Центр — Всероссийский научно-исследовательский институт экспериментальной физики; Нижегородский государственный технический университет им. Р.Е. Алексеева</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Federal Nuclear Center — The All-Russian Research Institute of Experimental Physics; Nizhny Novgorod State Technical University n. a. R.E. Alekseev</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Московский авиационный институт</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow Aviation Institute</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>25</day><month>06</month><year>2022</year></pub-date><volume>15</volume><issue>2</issue><fpage>33</fpage><lpage>46</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Плыгунова К.С., Козелков А.С., Стрелец Д.Ю., Уткин Д.А., Курулин В.В., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Плыгунова К.С., Козелков А.С., Стрелец Д.Ю., Уткин Д.А., Курулин В.В.</copyright-holder><copyright-holder xml:lang="en">Plygunova K.S., Kozelkov A.S., Strelets D.Y., Utkin D.A., Kurulin V.V.</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/693">https://hydrophysics.spbrc.ru/jour/article/view/693</self-uri><abstract><p>Статья посвящена исследованию влияния численного метода и сеточных параметров на точность моделирования свободных колебаний цилиндра на водной поверхности. Представлено описание используемого численного метода моделирования плавания тел, основанного на численном решении уравнений Навье-Стокса. Для численной дискретизации используется конечно-объемный метод, позволяющий проводить расчеты на неструктурированной сетке. Моделирование свободной поверхности проводится по методу VOF (Volume Of Fluid). Учет движения твердого тела осуществляется путем деформации расчетной сетки с сохранением ее топологии. Для решения уравнения движения и неразрывности используется метод SIMPLE. Учет сил поверхностного натяжения осуществляется с помощью модели CSF (Continuum Surface Force). Описанный численный метод применяется для решения задачи о затухающих свободных колебаниях цилиндра на водной поверхности. Рассматриваются вопросы влияния на решение сеточного разрешения, величины шага по времени, порядка аппроксимации по времени и по пространству, а также вопросы, касающиеся метода сглаживания гидродинамических сил, действующих на тело, которые зачастую используются для решения практических задач. Анализ полученных результатов показывает, что применение схем повышенного порядка для дискретизации по пространству и времени позволяет повысить точность решения. При высоком сеточном разрешении и малом шаге по времени коэффициент релаксации силы, действующей на тело, не оказывает сильного влияния на получаемый результат.</p></abstract><trans-abstract xml:lang="en"><p>The paper concentrates on the influence of grid parameters, the time step size, and the order of temporal and spatial approximation on the solution accuracy of the floating body problem. Damped free oscillations of the cylinder on the water surface is under consideration. The numerical simulation method of the floating bodies is based on the solution of a system of Navier-Stokes equations together with a VOF (Volume of Fluid) method. The Navier-Stokes equations are discretized using finite volume method (FVM), and solved by SIMPLE method. The motion of the body is ensured by the deformation of the computational grid. A CSF (Continuum Surface Force) model is used to account for the surface tension forces. The method is implemented in LOGOS software package. The research has shown that implementation of the second-order scheme for temporal and spatial discretization leads to a more accurate result. The relaxation factor of body surface force has no affects on the solution accuracy.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>вычислительная гидродинамика</kwd><kwd>volume of fluid</kwd><kwd>плавание тел</kwd><kwd>свободная поверхность</kwd><kwd>уравнения Навье-Стокса</kwd></kwd-group><kwd-group xml:lang="en"><kwd>CFD</kwd><kwd>volume of fluid</kwd><kwd>floating body</kwd><kwd>free surface flows</kwd><kwd>Navier–Stokes equations</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Результаты получены при финансовой поддержке национального проекта «Наука и университеты» в рамках программы Минобрнауки РФ по созданию молодёжных лабораторий № FSWE‑2021–0009 (научная тема: «Разработка численных методов, моделей и алгоритмов для описания гидродинамических характеристик жидкостей и газов в естественных природных условиях, и условиях функционирования индустриальных объектов в штатных и критических условиях на суперкомпьютерах петафлопсного класса»), а также при финансовой поддержке гранта Президента Российской Федерации по государственной поддержке ведущих научных школ НШ‑70.2022.1.5.</funding-statement><funding-statement xml:lang="en">Результаты получены при финансовой поддержке национального проекта «Наука и университеты» в рамках программы Минобрнауки РФ по созданию молодёжных лабораторий № FSWE‑2021–0009 (научная тема: «Разработка численных методов, моделей и алгоритмов для описания гидродинамических характеристик жидкостей и газов в естественных природных условиях, и условиях функционирования индустриальных объектов в штатных и критических условиях на суперкомпьютерах петафлопсного класса»), а также при финансовой поддержке гранта Президента Российской Федерации по государственной поддержке ведущих научных школ НШ‑70.2022.1.5.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Rajesh Kannah T., Natarajan R. 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