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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">vestifm</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия физико-математических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-2430</issn><issn pub-type="epub">2524-2415</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-2430-2025-61-3-231-243</article-id><article-id custom-type="elpub" pub-id-type="custom">vestifm-851</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>МАТЕМАТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATHEMATICS</subject></subj-group></article-categories><title-group><article-title>Численное решение двумерных задач конвекции несжимаемой жидкости в нерегулярных областях</article-title><trans-title-group xml:lang="en"><trans-title>Numerical solution of two-dimensional problems of incompressible fluid convection in irregular domains</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>Чуйко</surname><given-names>М. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Chuiko</surname><given-names>M. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чуйко Михаил Матвеевич – кандидат физико- математических наук, ведущий научный сотрудник отдела вычислительной математики</p><p>ул. Сурганова, 11, 220072, Минск</p></bio><bio xml:lang="en"><p>Mikhail M. Chuiko – Ph. D. (Physics and Mathematics), Leading Researcher of the Department of Computational Mathematics</p><p>11, Surganov Str., 220072, Minsk</p></bio><email xlink:type="simple">mikhail.chuiko@gmail.com</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>Королёва</surname><given-names>О. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Korolyova</surname><given-names>O. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Королёва Ольга Михайловна – кандидат физико-математических наук, доцент кафедры высшей математики</p><p>пр. Независимости, 65, 220013, Минск</p></bio><bio xml:lang="en"><p>Olga M. Korolyova – Ph. D. (Physics and Mathematics), Associate Professor of the Department of Higher Mathematics</p><p>65, Nezavisimosti Ave., 220013, Minsk</p></bio><email xlink:type="simple">korolyovaola@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт математики Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>Institute of Mathematics of the National Aca demy of Sciences of Belarus</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Белорусский национальный технический университет</institution></aff><aff xml:lang="en"><institution>Belarusian National Technical University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>14</day><month>10</month><year>2025</year></pub-date><volume>61</volume><issue>3</issue><fpage>231</fpage><lpage>243</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Чуйко М.М., Королёва О.М., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Чуйко М.М., Королёва О.М.</copyright-holder><copyright-holder xml:lang="en">Chuiko M.M., Korolyova O.M.</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://vestifm.belnauka.by/jour/article/view/851">https://vestifm.belnauka.by/jour/article/view/851</self-uri><abstract><p>Построен конечно-разностный вычислительный алгоритм решения уравнений конвекции несжимаемой жидкости в приближении Буссинеска, заданных в двумерных нерегулярных областях с использованием обобщенных криволинейных координат. Физическая область отображается в расчетную область (единичный квадрат) в пространстве обобщенных координат. Уравнения смешанной конвекции в естественных переменных записываются в обобщенных криволинейных координатах и аппроксимируются в расчетной области на равномерных неразнесенных разностных сетках. Построенный вычислительный алгоритм основан на разностных схемах расщепления. Полученные результаты отображаются на неравномерную разностную сетку, построенную в физической области. Приведены результаты решения краевых задач тепло- и массопереноса несжимаемой жидкости в областях сложной формы.</p></abstract><trans-abstract xml:lang="en"><p>A finite-difference computational algorithm for solving the equations of convective flows of incompressible fluid in two-dimensional irregular domains using generalized curvilinear coordinates is constructed. The physical domain is mapped into a computational domain (unit square) in the space of generalized coordinates. The equations of mixed convection in primitive variables are written in generalized curvilinear coordinates and approximated in the computational domain on uniform non-staggered grids. The constructed computational algorithm is based on splitting difference schemes. The obtained results are mapped onto a nonuniform difference grid in the physical domain. The results of solving boundary value problems of heat and mass transfer of incompressible fluid in domains of complex shape are presented.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>смешанная конвекция</kwd><kwd>обобщенные криволинейные координаты</kwd><kwd>конечно-разностные методы</kwd><kwd>разностные схемы расщепления</kwd></kwd-group><kwd-group xml:lang="en"><kwd>mixed convection</kwd><kwd>generalized curvilinear coordinates</kwd><kwd>finite-difference methods</kwd><kwd>splitting difference schemes</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Математическое моделирование конвективного тепломассообмена на основе уравнений Навье – Стокса / В. И. Полежаев, А. В. Бунэ, Н. А. Верезуб [и др.]. – М.: Наука, 1987. – 272 с.</mixed-citation><mixed-citation xml:lang="en">Polezhaev V. I., Bune A. V., Verezub N. A., Glushko G. S., Gryaznov V. L., Dubovik K. G. 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