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О способах повышения точности расчета ударных волн

Authors: Farfolomeyev, D. A.; Kazin, K. I.; Kuropanenko, V. F.;

О способах повышения точности расчета ударных волн

Abstract

Рассматривается неоднородный разностный метод расчета ударных волн в Лагранжевых координатах. Метод позволяет явно выделять в решении ударные волны в виде разрывов первого рода. Предлагаются способы повышения точности расчета выделенных ударных волн в рамках этого метода. В частности, для определения величин перед фронтом ударной волны наряду с разностным подходом предлагается использовать элементы метода характеристик. Приводится алгоритм модифицированного метода. На примере расчета методических задач показано, что применение модифицированного метода позволило повысить монотонность и точность расчета ударных волн. The paper presents a non-homogeneous difference method for shock wave simulation in Lagrangian coordinates. The method explicitly determines shocks as discontinuities of the first kind. The ways of increasing the accuracy of calculated shocks within the scope of the proposed method are suggested. In particular, the author suggests using the difference approach together with some elements of the method of characteristics to determine quantities before the shock front. The algorithm of the modified method is described. A number of methodical calculations are provided. On their basis it’s shown that the new method improves the monotonicity and accuracy of shock calculations. Варфоломеев Денис Александрович – начальник сектора, Российский Федеральный Ядерный Центр – Всероссийский Научно- Исследовательский Институт Технической Физики им. академика Е.И. Забабахина, г. Снежинск. E-mail: d.a.varfolomeev@mail.ru Казин Кирилл Иванович – младший научный сотрудник, Российский Федеральный Ядерный Центр – Всероссийский Научно-Исследовательский Институт Технической Физики им. академика Е.И. Забабахина, г. Снежинск. E-mail: k_kirill@sibmail.com. Куропатенко Валентин Федорович – доктор физико-математических наук, профессор, главный научный сотрудник, Российский Федеральный Ядерный Центр – Всероссийский Научно-Исследовательский Институт Технической Физики им. академика Е.И. Забабахина, г. Снежинск. E-mail: v.f.kuropatenko@rambler.ru. Varfolomeev Denis Aleksandrovich is Head of the sector, Russian Federal Nuclear Center – Zababakhin All-Russian Scientific Research Institute of Technical Physics, Snezhinsk. E-mail: d.a.varfolomeev@mail.ru 2 Kazin Kirill Ivanovich is Junior Research Fellow, Russian Federal Nuclear Center – Zababakhin All-Russian Scientific Research Institute of Technical Physics, Snezhinsk. E-mail: k_kirill@sibmail.com 3 Kuropatenko Valentin Fedorovich is Dr. Sc. (Physics and Mathematics), Professor, Senior Researcher, Russian Federal Nuclear Center – Zababakhin All-Russian Scientific Research Institute of Technical Physics, Snezhinsk. E-mail: vfkuropatenko@rambler.ru

Country
Russian Federation
Keywords

неоднородный разностный метод, shock wave, non-homogeneous difference method, сильный разрыв, ударная волна, УДК 519.63, strong discontinuity, ГРНТИ 27.41

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green