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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">matmess</journal-id><journal-title-group><journal-title xml:lang="ru">Математические заметки СВФУ</journal-title><trans-title-group xml:lang="en"><trans-title>Mathematical notes of NEFU</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2411-9326</issn><issn pub-type="epub">2587-876X</issn><publisher><publisher-name>Северо-Восточный федеральный университет имени М.К. Аммосова</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.25587/SVFU.2017.2.9249</article-id><article-id custom-type="elpub" pub-id-type="custom">matmess-354</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>МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ</subject></subj-group></article-categories><title-group><article-title>МАТЕМАТИЧЕСКАЯ МОДЕЛЬ ПРОМЕРЗАНИЯ НЕНАСЫЩЕННОГО ГРУНТА ПРИ НАЛИЧИИ КАПИЛЛЯРНЫХ СИЛ</article-title><trans-title-group xml:lang="en"><trans-title>A MATHEMATICAL MODEL OF FREEZING OF UNSATURATED SOILS IN THE PRESENCE OF CAPILLARY PRESSURE</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>Цыпкин</surname><given-names>Г. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Tsypkin</surname><given-names>G. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Цыпкин Георгий Геннадьевич</p><p>Институт проблем механики им. А. Ю. Ишлинского РАН, пр. Вернадского, 101-1, Москва 119526 </p></bio><bio xml:lang="en"><p>Georgii G. Tsypkin</p><p>Ishlinsky Institute for Problems in Mechanics of the Russian Academy of Sciences, pr. Vernadskogo 101-1, Moscow 119526, Russia</p></bio><email xlink:type="simple">tsypkin@ipmnet.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт проблем механики им. А. Ю. Ишлинского РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ishlinsky Institute for Problems in Mechanics of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>15</day><month>06</month><year>2026</year></pub-date><volume>24</volume><issue>2</issue><fpage>94</fpage><lpage>105</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Цыпкин Г.Г., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Цыпкин Г.Г.</copyright-holder><copyright-holder xml:lang="en">Tsypkin G.G.</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://matmess.elpub.ru/jour/article/view/354">https://matmess.elpub.ru/jour/article/view/354</self-uri><abstract><p>Сформулирована математическая модель промерзания грунта, насыщенного гетерогенной смесью воды и воздуха, при наличии капиллярного давления. Представлен вывод уравнения диффузии влаги, следующий из законов сохранения масс и импульса, позволяющий выразить коэффициент диффузии через параметры среды. Выведены балансовые соотношения и предложено замыкающее соотношение на фронте кристаллизации воды. В линейном приближении получено автомодельное решение задачи.</p></abstract><trans-abstract xml:lang="en"><p>A mathematical model of freezing of soils saturated with a heterogeneous mixture of water and air in the presence of capillary pressure is proposed. The derivation of the diffusion equation for the redistribution of moisture from the laws of conservation of mass and momentum is given. This allows us to define the diffusion coefficient through the parameters of the porous medium and fluids. Balance relations through the water crystallization front is derived. A self-similar solution of the problem in the linear approximation is obtained. It is shown that the growth of capillary forces reduces the amount of ice formed, and a more intensive freezing regime leads to an increase in the saturation with ice.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>ненасышенные грунты</kwd><kwd>капиллярное давление</kwd><kwd>фильтрация</kwd><kwd>фазовые переходы</kwd><kwd>лед</kwd></kwd-group><kwd-group xml:lang="en"><kwd>unsaturated soil</kwd><kwd>capillary pressure</kwd><kwd>filtration</kwd><kwd>freezing</kwd><kwd>ice</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке гранта РФФИ № 16–01–00363.</funding-statement><funding-statement xml:lang="en">The work was supported by the grant from the Russian Foundation for Basic Research (project code 16–01–00363).</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">Цытович Н. А. Механика мерзлых грунтов. 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