Abstract:
Nonlinear wave processes described by a fifth-order generalized KdV equation derived from the Fermi–Pasta–Ulam (FPU) model are considered. It is shown that, in contrast to the KdV equation, which demonstrates the recurrence of initial states and explains the FPU paradox, the fifthorder equation fails to pass the Painlevé test, is not integrable, and does not exhibit the recurrence of the initial state. The results of this paper show that the FPU paradox occurs only at an initial stage of a numerical experiment, which is explained by the existence of KdV solitons only on a bounded initial time interval.
Citation:
A. K. Volkov, N. A. Kudryashov, “Nonlinear waves described by a fifth-order equation derived from the Fermi–Pasta–Ulam system”, Zh. Vychisl. Mat. Mat. Fiz., 56:4 (2016), 685–693; Comput. Math. Math. Phys., 56:4 (2016), 680–687
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\by A.~K.~Volkov, N.~A.~Kudryashov
\paper Nonlinear waves described by a fifth-order equation derived from the Fermi--Pasta--Ulam system
\jour Zh. Vychisl. Mat. Mat. Fiz.
\yr 2016
\vol 56
\issue 4
\pages 685--693
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\crossref{https://doi.org/10.7868/S0044466916040177}
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\jour Comput. Math. Math. Phys.
\yr 2016
\vol 56
\issue 4
\pages 680--687
\crossref{https://doi.org/10.1134/S0965542516040151}
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Linking options:
https://www.mathnet.ru/eng/zvmmf10377
https://www.mathnet.ru/eng/zvmmf/v56/i4/p685
This publication is cited in the following 4 articles:
S. Kashchenko, A. Tolbey, “New irregular solutions in the spatially distributed Fermi-Pasta-Ulam problem”, Mathematics, 9:22 (2021), 2872
S. Kashchenko, “The interaction of waves in the Fermi-Pasta-Ulam model”, Commun. Nonlinear Sci. Numer. Simul., 91 (2020), 105436
S. D. Glyzin, S. A. Kashchenko, A. O. Tolbey, “Two-wave interactions in the Fermi-Pasta-Ulam model”, Autom. Control Comp. Sci., 51:7 (2017), 627–633
S. D. Glyzin, S. A. Kaschenko, A. O. Tolbei, “Vzaimodeistvie dvukh voln v modeli Fermi–Pasta–Ulama”, Model. i analiz inform. sistem, 23:5 (2016), 548–558
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