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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">vmait</journal-id><journal-title-group><journal-title xml:lang="ru">Computational Mathematics and Information Technologies</journal-title><trans-title-group xml:lang="en"><trans-title>Computational Mathematics and Information Technologies</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2587-8999</issn><publisher><publisher-name>Донской государственный технический университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.23947/2587-8999-2019-1-1-1-16</article-id><article-id custom-type="elpub" pub-id-type="custom">vmait-39</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Повышение гладкости численного решения моделирования задач гидродинамики на прямоугольных сетках</article-title><trans-title-group xml:lang="en"><trans-title>Improvement of numerical solution smoothness for the hydrodynamics problems modeling on rectangular grids</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5875-1523</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сухинов</surname><given-names>Александр Иванович</given-names></name><name name-style="western" xml:lang="en"><surname>Sukhinov</surname><given-names>Alexander Ivanovich</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сухинов Александр Иванович, Донской государственный технический университет (344000 Ростов-на-Дону, пл. Гагарина, д. 1), доктор физико-математических наук, профессор</p></bio><bio xml:lang="en"><p>Sukhinov Alexander Ivanovich, Don State Technical University (1st Gagarin Square, Rostov-on-Don, Russian Federation), Doctor of Science in Physics and Maths, Professor</p></bio><email xlink:type="simple">sukhinov@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8323-6005</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чистяков</surname><given-names>Александр Евгеньевич</given-names></name><name name-style="western" xml:lang="en"><surname>Chistyakov</surname><given-names>Alexander Evgenievich</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чистяков Александр Евгеньевич, Донской государственный технический университет (344000 Ростов-на-Дону, пл. Гагарина, д. 1), доктор физико-математических наук, доцент</p></bio><bio xml:lang="en"><p>Chistyakov Alexander Evgenievich, Don State Technical University (1st Gagarin Square, Rostov-on-Don, Russian Federation), Doctor of Science in Physics and Maths, Associate professor</p></bio><email xlink:type="simple">cheese_05@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7911-3558</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Проценко</surname><given-names>Елена Анатольевна</given-names></name><name name-style="western" xml:lang="en"><surname>Protsenko</surname><given-names>Elena Anatolevna</given-names></name></name-alternatives><bio xml:lang="ru"><p>Проценко Елена Анатольевна, Таганрогский институт им. А.П. Чехова (филиал) РГЭУ (РИНЭ) (347936 Таганрог, улица Инициативная, д. 48), кандидат физико-математических наук</p></bio><bio xml:lang="en"><p>Protsenko Elena Anatolevna, Taganrog Institute of A.P. Chekhov (branch) RSUE (Initiative Street, Taganrog, Russian Federation), Candidate of Science in Physics and Maths, Associate professor</p></bio><email xlink:type="simple">eapros@rambler.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сидорякина</surname><given-names>Валентина Владимировна</given-names></name><name name-style="western" xml:lang="en"><surname>Sidoryakina</surname><given-names>Valentina Vladimirovna</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сидорякина Валентина Владимировна, Таганрогский институт им. А.П. Чехова (филиал) РГЭУ (РИНЭ) (347936 Таганрог, улица Инициативная, д. 48), кандидат физико-математических наук, доцент</p></bio><bio xml:lang="en"><p>Sidoryakina Valentina Vladimirovna, Taganrog Institute of A.P. Chekhov (branch) RSUE (Initiative Street, Taganrog, Russian Federation), Candidate of Science in Physics and Maths, Associate professor</p></bio><email xlink:type="simple">cvv9@mail.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9656-8466</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Проценко</surname><given-names>Софья Владимировна</given-names></name><name name-style="western" xml:lang="en"><surname>Protsenko</surname><given-names>Sofya Vladimirovna</given-names></name></name-alternatives><bio xml:lang="ru"><p>Проценко Софья Владимировна, Донской государственный технический университет (344000 Ростов-на-Дону, пл. Гагарина, д. 1), аспирант</p></bio><bio xml:lang="en"><p>Protsenko Sofya Vladimirovna, Don State Technical University (1st Gagarin Square, Rostov-on-Don, Russian Federation), postgraduate student</p></bio><email xlink:type="simple">rab55555@rambler.ru</email><xref ref-type="aff" rid="aff-4"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Донской государственный технический университет &#13;
(344000 Ростов-на-Дону, пл. Гагарина, д. 1)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Don State Technical University &#13;
(1st Gagarin Square, Rostov-on-Don, Russian Federation)</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Таганрогский институт им. А.П. Чехова (филиал) РГЭУ (РИНЭ) &#13;
(347936 Таганрог, улица Инициативная, д. 48)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Taganrog Institute of A.P. Chekhov (branch) RSUE&#13;
(Initiative Street, Taganrog, Russian Federation)</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Таганрогский институт им. А.П. Чехова (филиал) РГЭУ (РИНЭ) &#13;
(347936 Таганрог, улица Инициативная, д. 48)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Taganrog Institute of A.P. Chekhov (branch) RSUE &#13;
(Initiative Street, Taganrog, Russian Federation)</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Донской государственный технический университет (344000 Ростов-на-Дону, пл. Гагарина, д. 1)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Don State Technical University &#13;
(1st Gagarin Square, Rostov-on-Don, Russian Federation)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>24</day><month>03</month><year>2023</year></pub-date><volume>3</volume><issue>1</issue><elocation-id>39</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Сухинов А.И., Чистяков А.Е., Проценко Е.А., Сидорякина В.В., Проценко С.В., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Сухинов А.И., Чистяков А.Е., Проценко Е.А., Сидорякина В.В., Проценко С.В.</copyright-holder><copyright-holder xml:lang="en">Sukhinov A.I., Chistyakov A.E., Protsenko E.A., Sidoryakina V.V., Protsenko S.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://www.cmit-journal.ru/jour/article/view/39">https://www.cmit-journal.ru/jour/article/view/39</self-uri><abstract><p>В работе рассматривается развитие и применение метода учета заполненности прямоугольных ячеек материальной средой, в частности, жидкостью для повышения гладкости и точности конечноразностного решения задач гидродинамики со сложной формой граничной поверхности. Для исследования возможностей предлагаемого метода рассмотрены две задачи вычислительной гидродинамики – пространственно-двумерного течения вязкой жидкости между двумя соосными полуцилиндрами и пространственно-трехмерная задача волновой гидродинамики – распространения волны в прибрежной зоне и ее выхода на сушу. Для решения поставленных задач используются прямоугольные сетки, учитывающие заполненность ячеек. Аппроксимация задач по времени выполнена на основе схем расщепления по физическим процессам, а по пространственным переменным – на основе интегро-интерполяционного метода с учетом заполненности ячеек и без ее учета. Для оценки точности численного решения первой задачи в качестве эталона используется аналитическое решение, описывающее течение Куэтта-Тейлора. Моделирование производилось на последовательности сгущающихся расчетных сеток размерами: 11×21, 21×41, 41×81 и 81×161 узлов в случае применения метода и без его использования. В случае непосредственного использования прямоугольных сеток (ступенчатой аппроксимации границ) относительная погрешность расчетов достигает 70%; при тех же условиях использование предлагаемого метода позволяет уменьшить погрешность до 6%. Показано, что дробление прямоугольной сетки в 2-8 раз по каждому из пространственных направлений не приводит к такому же повышению точности, которой обладают численные решения, полученные с учетом заполненности ячеек.</p></abstract><trans-abstract xml:lang="en"><p>The article has been devoted to the problem of improvement real numerical modeling accuracy for the viscous fluid flow between two coaxial half-cylinders on rectangular grids taking into account the filling of cells are used to solve this problem. Approximation of the problem with respect to time is performed on the basis of splitting schemes for physical processes. Difference schemes for solving the hydrodynamic problem are proposed. Analytic solution describing the Taylor-Couette flow is used as a standard to evaluate the numerical solution accuracy of hydrodynamics problems. The simulation was performed on a sequence of condensing computed grids of sizes 11 × 21, 21 × 41, 41 × 81, and 81 × 161 nodes for the areas of smooth and piecewise rectangular boundaries. The grids taking into account the filling of cells are used to improve the smoothness of the solution. In the case of piecewise rectangular approximation the numerical solution error reaches 70%. The grids taking into account the filling of cells reduce the numerical solution error to 6% for the test problem. The test problem shows that using the grid condenced in each spatial direction by 8 times does not lead to increasing the accuracy solutions whereas the solutions accuracy obtained on the basis proposed approach has significant advantage in accuracy.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>схемы расщепления по физическим процессам</kwd><kwd>течение Куэтта-Тейлора</kwd><kwd>погрешность численного решения.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Navier-Stokes equation</kwd><kwd>splitting schemes for physical processes</kwd><kwd>the Taylor-Couette flow</kwd><kwd>the error of numerical solution</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">РНФ (проект № 17-11–01286)</funding-statement><funding-statement xml:lang="en">The work was supported by the RSF (project No. 17-11-01286).</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">A.I. 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