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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">Contemporary Mathematics. Fundamental Directions</journal-id><journal-title-group><journal-title xml:lang="en">Contemporary Mathematics. Fundamental Directions</journal-title><trans-title-group xml:lang="ru"><trans-title>Современная математика. Фундаментальные направления</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2413-3639</issn><issn publication-format="electronic">2949-0618</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">33490</article-id><article-id pub-id-type="doi">10.22363/2413-3639-2022-68-4-553-563</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">In uence of numerical diffusion on the growth rate of viscous  ngers in the numerical implementation of the Peaceman model by the finite volume method</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние численной диффузии на скорость роста вязких пальцев при численной реализации модели Писмана методом конечных объемов</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Apushkinskaya</surname><given-names>D. E.</given-names></name><name xml:lang="ru"><surname>Апушкинская</surname><given-names>Д. Е.</given-names></name></name-alternatives><email>apuskinskaya-de@rudn.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Lazareva</surname><given-names>G. G.</given-names></name><name xml:lang="ru"><surname>Лазарева</surname><given-names>Г. Г.</given-names></name></name-alternatives><email>lazareva-gg@rudn.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Okishev</surname><given-names>V. A.</given-names></name><name xml:lang="ru"><surname>Окишев</surname><given-names>В. А.</given-names></name></name-alternatives><email>okishev-va@rudn.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Peoples’ Friendship University of Russia (RUDN University)</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2022</year></pub-date><volume>68</volume><issue>4</issue><issue-title xml:lang="en">VOL 68, NO4 (2022)</issue-title><issue-title xml:lang="ru">ТОМ 68, №4 (2022)</issue-title><fpage>553</fpage><lpage>563</lpage><history><date date-type="received" iso-8601-date="2023-02-06"><day>06</day><month>02</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Apushkinskaya D.E., Lazareva G.G., Okishev V.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Апушкинская Д.Е., Лазарева Г.Г., Окишев В.А.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Apushkinskaya D.E., Lazareva G.G., Okishev V.A.</copyright-holder><copyright-holder xml:lang="ru">Апушкинская Д.Е., Лазарева Г.Г., Окишев В.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/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/CMFD/article/view/33490">https://journals.rudn.ru/CMFD/article/view/33490</self-uri><abstract xml:lang="en"><p style="text-align: justify;">A numerical model of oil displacement by a mixture of water and polymer based on the Peaceman model is considered. Numerical experiments were carried out using the DuMu<sup>x</sup> package, which is a software library designed for modeling nonstationary hydrodynamic problems in porous media. The software package uses the vertex-centered variant of finite volume method. The effect of diffusion on the growth rate of ''viscous fingers'' has been studied. The dependencies of the leading front velocity on the value of model diffusion are obtained for three viscosity models. It is shown that the effect of numerical diffusion on the growth rate of ''viscous fingers'' imposes limitations on calculations for small values of model diffusion.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Рассмотрена численная модель вытеснения нефти смесью воды и полимера на основе модели Писмана. Проведены численные эксперименты с помощью пакета DuMu<sup>x</sup>, представляющего собой программную библиотеку, предназначенную для моделирования нестационарных гидродинамических задач в пористых средах. Пакет программ использует вариант метода конечных объемов «vertex-centered». Исследовано влияние диффузии на скорость роста «вязких пальцев». Получены зависимости скорости переднего фронта от значения модельной диффузии для трех моделей вязкости. Показано, что влияние численной диффузии на скорость роста «вязких пальцев» ставит ограничения на расчеты при малых значениях модельной диффузии.</p></trans-abstract><kwd-group xml:lang="en"><kwd>mathematical modeling</kwd><kwd>Peaceman model</kwd><kwd>viscous  fingers</kwd><kwd>porous media</kwd><kwd>DuMux package</kwd><kwd>numerical diffusion</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>математическое моделирование</kwd><kwd>модель Писмана</kwd><kwd>вязкие пальцы</kwd><kwd>пористые среды</kwd><kwd>пакет DuMux</kwd><kwd>численная диффузия</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Азиз Х., Сеттари Э. Математическое моделирование пластовых систем. - М.-Ижевск: Инст. комп. иссл., 2004.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Ламб Г. Гидродинамика. - М.-Л.: Гостехиздат, 1947.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Логвинов О. А. 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