<article 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" article-type="research-article" dtd-version="1.2" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">Differential Equations</journal-id><journal-title-group><journal-title>Differential Equations</journal-title></journal-title-group><issn publication-format="print">0374-0641</issn><issn publication-format="electronic">3034-5030</issn><publisher><publisher-name>Russian Academy of Science</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31857/S0374064123070105</article-id><title-group><article-title>K voprosu o chislennom reshenii nekonservativnykh giperbolicheskikh sistem uravneniy</article-title><trans-title-group xml:lang="ru"><trans-title>К вопросу о численном решении неконсервативных гиперболических систем уравнений</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Polekhina</surname><given-names>R. R</given-names></name><name xml:lang="ru"><surname>Полехина</surname><given-names>Р. Р </given-names></name></name-alternatives><email>Polekhina@keldysh.ru</email><xref ref-type="aff" rid="aff-1"></xref><xref ref-type="aff" rid="aff-2"></xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Alekseev</surname><given-names>M. V</given-names></name><name xml:lang="ru"><surname>Алексеев</surname><given-names>М. В </given-names></name></name-alternatives><email>mikhail.alekseev@phystech.edu</email><xref ref-type="aff" rid="aff-3"></xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Savenkov</surname><given-names>E. B</given-names></name><name xml:lang="ru"><surname>Савенков</surname><given-names>Е. Б </given-names></name></name-alternatives><email>e.savenkov@gmail.com</email><xref ref-type="aff" rid="aff-5"></xref></contrib></contrib-group><aff-alternatives id="aff-1"><aff><institution xml:lang="ru">Институт прикладной математики имени М.В. Келдыша РАН</institution><institution xml:lang="en">Keldysh Institute of Applied Mathematics</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff><institution xml:lang="ru"></institution><institution xml:lang="en"></institution></aff></aff-alternatives><aff-alternatives id="aff-3"><aff><institution xml:lang="ru">Институт прикладной математики имени М.В. Келдыша РАН</institution><institution xml:lang="en">Keldysh Institute of Applied Mathematics</institution></aff></aff-alternatives><aff-alternatives id="aff-5"><aff><institution xml:lang="ru">Институт прикладной математики имени М.В. Келдыша РАН</institution><institution xml:lang="en">Keldysh Institute of Applied Mathematics</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-07-15" publication-format="electronic"><day>15</day><month>07</month><year>2023</year></pub-date><volume>59</volume><issue>7</issue><fpage>968</fpage><lpage>982</lpage><abstract xml:lang="en"><p>Issues related to the lack of convergence in the application of formally path-conservative difference schemes for solving nonconservative hyperbolic systems of equations are numerically investigated. This problem is central in constructing well-posed difference schemes for solving this class of problems. The basic concepts of the theory of nonconservative hyperbolic systems of equations and the corresponding problems of constructing difference schemes for their solution are outlined. A variant of the HLL method is proposed that allows using an arbitrary explicitly specified path. For a model system of Burgers equations, the shock adiabates and paths corresponding to the viscous regularization of a system of a given form are explicitly calculated. The reasons for the lack of convergence of numerical solutions of exact ones in the case of incorrect application of the corresponding algorithms are analyzed. It is shown that, at least in the particular case considered, a variant of the HLL method that is formally conservative along the way gives the correct solution of the problem.</p></abstract><trans-abstract xml:lang="ru"><p>Численно исследованы вопросы, связанные с отсутствием сходимости при применении формально консервативных по пути разностных схем для решения неконсервативных гиперболических систем уравнений. Эта проблема является центральной при построении корректных разностных схем для решения указанного класса задач. Изложены базовые понятия теории неконсервативных гиперболических систем уравнений и соответствующие проблемы построения разностных схем для их решения. Предложен вариант метода HLL, позволяющий использовать произвольный явно заданный путь. Для модельной системы уравнений Бюргерса явно вычислены ударные адиабаты и пути, соответствующие вязкой регуляризации системы заданного вида. Проанализированы причины отсутствия сходимости численных решений к точным при некорректном применении соответствующих алгоритмов. Показано, что по крайней мере в частном рассмотренном случае формально консервативный по пути вариант метода HLL даёт правильное решение задачи.</p></trans-abstract></article-meta></front><body></body><back><ref-list><ref id="B1"><label>B1</label><citation-alternatives><mixed-citation xml:lang="ru">LeFloch P.G., Mohammadian M. Why many theories of shock waves are necessary: kinetic functions, equivalent equations, and fourth-order models // J. of Comput. Phys. 2008. V. 227. № 8. 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