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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">najo</journal-id><journal-title-group><journal-title xml:lang="en">Nanosystems: Physics, Chemistry, Mathematics</journal-title><trans-title-group xml:lang="ru"><trans-title>Наносистемы: физика, химия, математика</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-8054</issn><issn pub-type="epub">2305-7971</issn><publisher><publisher-name>Университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">najo-1192</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="en"><subject>PHYSICS</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ФИЗИКА</subject></subj-group></article-categories><title-group><article-title>Investigations of heat conductivity of nanofluids based on aluminum oxide nanoparticles</article-title><trans-title-group xml:lang="ru"><trans-title>Исследование теплопроводности наножидкостей на основе наночастиц оксида алюмиия</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>Бардаханов</surname><given-names>С. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Bardakhanov</surname><given-names>S. P.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Новопашин</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Novopashin</surname><given-names>S. A.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Серебрякова</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Serebrjakova</surname><given-names>M. A.</given-names></name></name-alternatives><email xlink:type="simple">sanov@itp.nsc.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт теоретической и прикладной механики им. С.А. Христиановича СО РАН</institution></aff><aff xml:lang="en"><institution>Khristianovich Institute of Theoretical and Applied Mechanics Siberian Branch of the Russian Academy of Sciences</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт теплофизики им. С.С. Кутателадзе СО РАН</institution></aff><aff xml:lang="en"><institution>Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2012</year></pub-date><pub-date pub-type="epub"><day>20</day><month>08</month><year>2025</year></pub-date><volume>3</volume><issue>1</issue><fpage>27</fpage><lpage>33</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Bardakhanov S.P., Novopashin S.A., Serebrjakova M.A., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Бардаханов С.П., Новопашин С.А., Серебрякова М.А.</copyright-holder><copyright-holder xml:lang="en">Bardakhanov S.P., Novopashin S.A., Serebrjakova M.A.</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://nanojournal.ifmo.ru/jour/article/view/1192">https://nanojournal.ifmo.ru/jour/article/view/1192</self-uri><abstract><p>The heat conductivity of nanofluids based on aluminum oxide nanoparticles (mean diameter of 13 nm) have been measured experimentally. Glycol and isopropyl alcohol as the based fluids were used. The non stationary “hot wire” method has been used. It was shown the heat conductivity at low volume concentration of nanoparticles (&lt;0,5 %) corresponds to classical Maxwell theory. For higher volume concentration of nanoparticles in glycol the heat conductivity deviated to low side due to aggregate instability of the nanofluid. The anomalous growth of heat conductivity in isopropyl alcohol have been observed. The possible nature of the observed phenomenon is discussed in conclusion.</p></abstract><trans-abstract xml:lang="ru"><p>В работе экспериментально исследована теплопроводность наножидкостей на основе наночастиц оксида алюминия (средний диаметр частиц 13 нм). В качестве базовых жидкостей использованы этиленгликоль и изопропанол. Для измерений использован нестационарный метод нагретой проволочки. Показано, что теплопроводность наножидкостей при малых объёмных концентрациях наночастиц 𝐴𝑙2𝑂3 (&lt;0,5 %) соответствует классической теории Максквелла. С дальнейшим ростом концентрации наночастиц в этиленгликоле теплопроводность отклоняется от теории в меньшую сторону, так как становится агрегативно неустойчивой, а в изопропаноле наблюдается аномальное отклонение от теории в большую сторону. В заключение обсуждаются возможные причины наблюдаемого явления.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>наножидкость</kwd><kwd>теплопроводность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>nanofluid</kwd><kwd>heat conductivity</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа была выполнена при финансовой поддержке РФФИ (грант № 09-08-00282), гранта Президента РФ по поддержке ведущих научных школ НШ-3563.2010.1.</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">Choi S.U.S. Enhancing thermal conductivity of fluids with nanoparticles, in: D.A. Siginer, H.P. Wang (Eds.). Developments and Applications of Non-Newtonian Flows, 1995, FED-231/MD 66, ASME, New York, 99-105.</mixed-citation><mixed-citation xml:lang="en">Choi S.U.S. Enhancing thermal conductivity of fluids with nanoparticles, in: D.A. Siginer, H.P. Wang (Eds.). 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