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<article xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" dtd-version="1.4" article-type="research-article" xml:lang="en"><front><journal-meta><journal-title-group><journal-title xml:lang="ru">Дальневосточный математический журнал</journal-title></journal-title-group><issn publication-format="print">1608-845X</issn></journal-meta><article-meta><article-id pub-id-type="doi">10.47910/FEMJ202601</article-id><article-categories><subj-group><subject>Other</subject></subj-group></article-categories><title-group><article-title xml:lang="ru">Анализ краевых задач для стационарных моделей диффузионного тепломассопереноса с переменными коэффициентами переноса</article-title><trans-title-group xml:lang="en"><trans-title>Analysis of boundary value problems for stationary models of diffusive heat and mass transfer with variable transport coefficients</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Алексеев</surname><given-names>Г. В.</given-names></name><name xml:lang="en"><surname>Alekseev</surname><given-names>G.V.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff3"/><xref ref-type="aff" rid="aff4"/><email>alekseev@iam.dvo.ru</email><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2570-3696</contrib-id></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Соболева</surname><given-names>О. В.</given-names></name><name xml:lang="en"><surname>Soboleva</surname><given-names>O.V.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff3"/><email>soboleva22@mail.ru</email><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5348-4596</contrib-id></contrib><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute for Applied Mathematics, Far Eastern Branch, Russian Academy of Sciences</institution><city xml:lang="en">Vladivostok</city><country xml:lang="en">Russia</country></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Far Eastern Federal University</institution><city xml:lang="en">Vladivostok</city><country xml:lang="en">Russia</country></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="ru">Институт прикладной математики Дальневосточного отделения Российской академии наук</institution><city xml:lang="ru">Владивосток</city><country xml:lang="ru">Россия</country></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="ru">Дальневосточный федеральный университет</institution><city xml:lang="ru">Владивосток</city><country xml:lang="ru">Россия</country></aff></aff-alternatives></contrib-group><pub-date pub-type="epub" iso-8601-date="2026-06-15"><day>15</day><month>06</month><year>2026</year></pub-date><volume>26</volume><issue>1</issue><fpage>3</fpage><lpage>13</lpage><history><date date-type="received" iso-8601-date="2025-10-23"><day>23</day><month>10</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2026-05-25"><day>25</day><month>05</month><year>2026</year></date></history><permissions><license xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:title="CC BY 4.0"><ali:license_ref>https://creativecommons.org/licenses/by/4.0/</ali:license_ref><license-p xml:lang="ru">CC BY 4.0</license-p></license></permissions><self-uri xlink:href="http://femj.iam.dvo.ru/periodical.php?art=568" xlink:title="http://femj.iam.dvo.ru/periodical.php?art=568">http://femj.iam.dvo.ru/periodical.php?art=568</self-uri><self-uri content-type="pdf" xlink:href="publication-6e8209a2-e17c-4ce7-99d9-ebd244dd39b2.pdf" xlink:title="PDF"/><abstract xml:lang="ru"><p>Доказывается глобальная разрешимость краевых задач для стационарных моделей диффузионного тепломассопереноса, учитывающих эффект Соре́ или Дюфура. Выводятся априорные оценки решения (температуры и концентрации) и анализируется их зависимость от всех коэффициентов переноса, входящих в рассматриваемые модели. Устанавливается особый характер зависимости указанных величин от модулей коэффициентов Соре́ или Дюфура. Доказывается теорема о локальной единственности слабого решения, обладающего дополнительным свойством гладкости из пространства H^2(Ω).</p></abstract><abstract xml:lang="en" abstract-type="summary"><p>Global solvability of boundary value problems for stationary models of diffusive heat and mass transfer, taking into account the Soret or Dufour effect, is proved. A priori estimates for the solution (temperature and concentration) are derived and their dependence on all transport coefficients entering the considered models is analyzed. A special character of the dependence of these quantities on the moduli of the Soret or Dufour coefficients is established. A theorem on local uniqueness of a weak solution possessing additional smoothness from the spaceis proved.</p></abstract><kwd-group xml:lang="ru"><kwd>дифференциальные уравнения</kwd><kwd>тепломассоперенос</kwd><kwd>термодиффузия</kwd><kwd>краевая задача</kwd><kwd>переменные коэффициенты</kwd><kwd>разрешимость</kwd><kwd>единственность</kwd><kwd>коэффициент Соре́</kwd></kwd-group><kwd-group xml:lang="en"><kwd>differential equations</kwd><kwd>heat and mass transfer</kwd><kwd>boundary value problem</kwd><kwd>variable coefficients</kwd><kwd>solvability</kwd><kwd>uniqueness</kwd><kwd>Soré or Dufour coefficients</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено в рамках государственного задания ИПМ ДВО РАН (проект №075-00459-25-00). Исследование первого автора также выполнено при финансовой поддержке Минобрнауки РФ (соглашение №075-02-2025-1638/1 от 10.03.2025).</funding-statement><funding-statement xml:lang="en">This study was conducted as part of a state assignment from the Institute of Applied Mathematics FEB RAS (Project No. 075-00459-25-00). The first author's research was also supported by the Ministry of Education and Science of the Russian Federation (Agreement No. 075-02-2025-1638/1 dated March 10, 2025).</funding-statement></funding-group></article-meta></front><back><ref-list><ref id="ref1"><mixed-citation publication-type="other" xml:lang="ru">Dias H., Galiano G., “Existence and uniqueness of solutions to the Boussinesq system with nonlinear thermal diffusion”, Topology Methods in Nonlinear Analysis, 11, (1998).</mixed-citation></ref><ref id="ref2"><mixed-citation publication-type="other" xml:lang="ru">Lorca S. A., Boldrini J. 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