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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Discrete and Continuous Models and Applied Computational Science</journal-id><journal-title-group><journal-title xml:lang="en">Discrete and Continuous Models and Applied Computational Science</journal-title><trans-title-group xml:lang="ru"><trans-title>Discrete and Continuous Models and Applied Computational Science</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2658-4670</issn><issn publication-format="electronic">2658-7149</issn><publisher><publisher-name xml:lang="en">Peoples' Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">8539</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Modiﬁcation of the Two-Dimensional Numerical Code for Gas-Dynamical Flows in Polar Coordinates</article-title><trans-title-group xml:lang="ru"><trans-title>Модификация 2D численного кода для газодинамических течений в полярных координатах</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Filistov</surname><given-names>E A</given-names></name><name xml:lang="ru"><surname>Филистов</surname><given-names>Евгений Александрович</given-names></name></name-alternatives><bio xml:lang="en">Department of Physics</bio><bio xml:lang="ru">Кафедра Физики</bio><email>ﬁlistov.ru@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Moscow State University of Civil Engineering</institution></aff><aff><institution xml:lang="ru">Московский государственный строительный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2013-02-15" publication-format="electronic"><day>15</day><month>02</month><year>2013</year></pub-date><issue>2</issue><issue-title xml:lang="en">NO2 (2013)</issue-title><issue-title xml:lang="ru">№2 (2013)</issue-title><fpage>150</fpage><lpage>158</lpage><history><date date-type="received" iso-8601-date="2016-09-08"><day>08</day><month>09</month><year>2016</year></date></history><permissions><copyright-statement xml:lang="ru">Copyright ©; 2013, Филистов Е.А.</copyright-statement><copyright-year>2013</copyright-year><copyright-holder xml:lang="ru">Филистов Е.А.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/miph/article/view/8539">https://journals.rudn.ru/miph/article/view/8539</self-uri><abstract xml:lang="en">The numerical method for solution of the gas-dynamical equations in strict divergent form has been modiﬁed. The two-dimensional numerical code for perfect non-stationary gas-dynamical ﬂows simulation on the polar grid is constructed. This code is based on the explicit quasimonotonic high resolution TVD-scheme.</abstract><trans-abstract xml:lang="ru">Модифицирован двумерный численный код для моделирования совершенного газового потока. Код построен на основе эффективного экономичного метода расчета нестационарных течений идеального газа с использованием полностью консервативной разностной схемы строго дивергентных газодинамических уравнений в эйлеровых переменных в полярных координатах.</trans-abstract><kwd-group xml:lang="en"><kwd>gas-dynamics</kwd><kwd>numerical simulation</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>газодинамика</kwd><kwd>численное моделирование</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Тихонов А. Н., Самарский А. А. 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