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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">probener</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. ПРОБЛЕМЫ ЭНЕРГЕТИКИ</journal-title><trans-title-group xml:lang="en"><trans-title>Power engineering: research, equipment, technology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1998-9903</issn><issn pub-type="epub">2658-5456</issn><publisher><publisher-name>Kazan State Power Engineering  University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.30724/1998-9903-2015-0-9-10-76-86</article-id><article-id custom-type="elpub" pub-id-type="custom">probener-145</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>ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group></article-categories><title-group><article-title>Совместное течение жидкости Гиезекуса и ньютоновской жидкости в круглой трубе</article-title><trans-title-group xml:lang="en"><trans-title>Joint flow of Giesekus fluid and viscous Newtonian fluid in a circular tube</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>Вачагина</surname><given-names>Е. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Vachagina</surname><given-names>E. K.</given-names></name></name-alternatives><email xlink:type="simple">evachagina@mail.ru</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>Кадыйров</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kadyirov</surname><given-names>A. I.</given-names></name></name-alternatives><email xlink:type="simple">gto66@inbox.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>Кайнова</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kaynova</surname><given-names>A. A.</given-names></name></name-alternatives><email xlink:type="simple">anastasiya-kaynova@mail.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>Осипов</surname><given-names>Г. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Osipov</surname><given-names>G. T.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>Федеральное государственное бюджетное учреждение науки Казанский научный центр Российской академии наук</institution><country>Russian Federation</country></aff><aff xml:lang="ru" id="aff-2"><institution>Казанский научный центр Российской академии наук</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2015</year></pub-date><pub-date pub-type="epub"><day>04</day><month>12</month><year>2017</year></pub-date><volume>0</volume><issue>9-10</issue><fpage>76</fpage><lpage>86</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Вачагина Е.К., Кадыйров А.И., Кайнова А.А., Осипов Г.Т., 2017</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="ru">Вачагина Е.К., Кадыйров А.И., Кайнова А.А., Осипов Г.Т.</copyright-holder><copyright-holder xml:lang="en">Vachagina E.K., Kadyirov A.I., Kaynova A.A., Osipov G.T.</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.energyret.ru/jour/article/view/145">https://www.energyret.ru/jour/article/view/145</self-uri><abstract><p>В работе получено решение задачи о совместном течении в круглой трубе: жидкости Гиезекуса в средней части и ньютоновской жидкости в пристеночной области трубы. Показано, что при определенных условиях значение градиента скорости сдвига в процессе течения двух рассматриваемых жидкостей меняется в меньших пределах по сравнению с течением единственной жидкости Гиезекуса, что способствует улучшению качественных характеристик полимерных изделий.</p></abstract><trans-abstract xml:lang="en"><p>Greatest interest to solve problems of the thermal utilization of wood biomass are thermochemical conversion techniques based on gasification to produce heat and electricity. In this work a methodology for evaluating the efficiency of energy conversion during the gasification of woody biomass using methods of thermal and thermodynamic analyze is presented. The thermal and exergetic balances are compiled, the thermal and exergy efficiency of gasifiers is determined; thermal efficiency values range from 40.4 to 96.7 %, exergetic efficiency - from 17.0 to 58.2 %.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>скорость сдвига</kwd><kwd>профиль скорости</kwd><kwd>реология</kwd><kwd>гидродинамика</kwd><kwd>вязкость</kwd><kwd>нормальные напряжения</kwd><kwd>коаксиальные каналы</kwd><kwd>расход</kwd><kwd>градиент давления</kwd></kwd-group><kwd-group xml:lang="en"><kwd>wood biomass</kwd><kwd>biomass</kwd><kwd>recycling</kwd><kwd>thermo chemical conversion</kwd><kwd>gasification</kwd><kwd>thermodynamic analysis</kwd><kwd>exergy</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">Гаврилова М. Рациональное использование отходов деревообработки: у всех на словах, но только не на деле // Лесной комплекс Сибири. 2013. № 3. 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