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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-1032</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>Benchmark solutions for nanoflows</article-title><trans-title-group xml:lang="ru"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Popov</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="en"><p>Kronverkskiy 49, 197101, St. Petersburg</p></bio><email xlink:type="simple">popov239@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Lobanov</surname><given-names>I. S.</given-names></name></name-alternatives><bio xml:lang="en"><p>Kronverkskiy 49, 197101, St. Petersburg</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Popov</surname><given-names>I. Yu.</given-names></name></name-alternatives><bio xml:lang="en"><p>Kronverkskiy 49, 197101, St. Petersburg</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Gerya</surname><given-names>T. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>5 Sonnegstrasse, CH-8092 Zurich</p></bio><email xlink:type="simple">taras.gerya@erdw.ethz.ch</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>ITMO University</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-2"><institution>Institute of Geophysics, Department of Earth Sciences, Swiss Federal Institute of Technology Zurich (ETH)</institution><country>Switzerland</country></aff><pub-date pub-type="collection"><year>2014</year></pub-date><pub-date pub-type="epub"><day>15</day><month>08</month><year>2025</year></pub-date><volume>5</volume><issue>3</issue><fpage>391</fpage><lpage>399</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Popov A.I., Lobanov I.S., Popov I.Y., Gerya T.V., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Popov A.I., Lobanov I.S., Popov I.Y., Gerya T.V.</copyright-holder><copyright-holder xml:lang="en">Popov A.I., Lobanov I.S., Popov I.Y., Gerya T.V.</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/1032">https://nanojournal.ifmo.ru/jour/article/view/1032</self-uri><abstract><p>Essential viscosity variation creates additional difficulties for numerical investigation of flows through nanotubes and nanochannels. Benchmark solutions of the Stokes and continuity equations with variable viscosity are suggested. This is useful for testing of numerical algorithms applied to this problem.</p></abstract><kwd-group xml:lang="en"><kwd>nanotube</kwd><kwd>Stokes flow</kwd><kwd>benchmark solution</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was partially financially supported by the Government of the Russian Federation (grant 074-U01), by the Ministry of Science and Education of the Russian Federation (GOSZADANIE 2014/190, Project 14.Z50.31.0031), by grants of the President of Russia (state contracts 14.124.13.2045-MK and 14.124.13.1493-MK).</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">Li, D. (Ed.) Encyclopedia of Microfluidics and Nanofluidics. Springer, New York (2008).</mixed-citation><mixed-citation xml:lang="en">Li, D. (Ed.) 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