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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">phmath</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Государственного университета просвещения. Серия: Физика-Математика</journal-title><trans-title-group xml:lang="en"><trans-title>Bulletin of Federal State University of Education. Series: Physics and Mathematics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2949-5083</issn><issn pub-type="epub">2949-5067</issn><publisher><publisher-name>Federal State University of Education</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18384/2310-7251-2019-4-60-69</article-id><article-id custom-type="elpub" pub-id-type="custom">phmath-34</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>РАЗДЕЛ II. ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SECTION II. PHYSICS</subject></subj-group></article-categories><title-group><article-title>ВЯЗКОСТНЫЙ МЕХАНИЗМ В ТЕОРИИ АНИЗОТРОПИИПОГЛОЩЕНИЯ УЛЬТРАЗВУКА МАГНИТНЫМИ ЖИДКОСТЯМИ</article-title><trans-title-group xml:lang="en"><trans-title>VISCOUS MECHANISM IN THE THEORY OF ULTRASOUND ATTENUATION ANISOTROPY BY MAGNETIC FLUIDS</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>Курилов</surname><given-names>А. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Kurilov</surname><given-names>A. D.</given-names></name></name-alternatives><email xlink:type="simple">ad.kurilov@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Соколов</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Sokolov</surname><given-names>V. V.</given-names></name></name-alternatives><email xlink:type="simple">vvs1953@rambler.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Эминов</surname><given-names>П. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Eminov</surname><given-names>P. A.</given-names></name></name-alternatives><email xlink:type="simple">peminov@mail.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>МИРЭА - Российский технологический университет, Московский государственный областной университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>MIREA - Russian Technological University, Moscow Region State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>МИРЭА - Российский технологический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>MIREA - Russian Technological University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Национальный исследовательский университет «Высшая школа экономики»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research University “Higher School of Economics”</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>15</day><month>02</month><year>2022</year></pub-date><volume>0</volume><issue>4</issue><fpage>60</fpage><lpage>69</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Курилов А.Д., Соколов В.В., Эминов П.А., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Курилов А.Д., Соколов В.В., Эминов П.А.</copyright-holder><copyright-holder xml:lang="en">Kurilov A.D., Sokolov V.V., Eminov P.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://www.physmathmgou.ru/jour/article/view/34">https://www.physmathmgou.ru/jour/article/view/34</self-uri><abstract><p>Проведён сравнительный анализ классической теории вязкостного механизма поглощения звука ультрадисперсными средами и одной из доминирующих теорий анизотропии поглощения звука магнитными жидкостями на основе вязкостного механизма. Теория Такетоми, используемая многими авторами, даёт завышенные значения размеров агрегатов в магнитных жидкостях и не позволяет количественно описать экспериментальные данные. Кроме того, формула, полученная Такетоми, в предельном случае не сводится к классическому выражению поглощения ультразвука, следовательно, должна считаться ошибочной.</p></abstract><trans-abstract xml:lang="en"><p>We report a comparative analysis of the classical theory of the viscous mechanism of sound attenuation by ultrafine media and one of the dominant theories of sound attenuation anisotropy by magnetic fluids on the basis of the viscous mechanism. The Taketomi theory used by many authors gives overestimated values for the size of aggregates in magnetic fluids and is not able to quantify experimental data. In addition, the formula obtained by Taketomi does not reduce to the classical expression for viscous absorption in the limiting case and, therefore, should be considered erroneous.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>магнитные жидкости</kwd><kwd>коэффициент поглощения</kwd><kwd>анизотропия</kwd><kwd>агрегаты</kwd><kwd>вязкостный механизм</kwd></kwd-group><kwd-group xml:lang="en"><kwd>magnetic fluids</kwd><kwd>attenuation coefficient</kwd><kwd>anisotropy</kwd><kwd>aggregates</kwd><kwd>viscous mechanism</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Рытов С. М., Владимирский В. В., Галанин М. Д. Распространение звука в дисперсных системах // Журнал экспериментальной и теоретической физики. 1938. Т. 8. № 5. С. 614-626.</mixed-citation><mixed-citation xml:lang="en">Рытов С. М., Владимирский В. В., Галанин М. Д. 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