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Large time behavior for the nonlinear dissipative Boussinesq equation

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  • Wenhui Chen
  • Hiroshi Takeda

Abstract

In this paper, we study the nonlinear dissipative Boussinesq equation in the whole space Rn$\mathbb {R}^n$ with L1$L^1$ integrable data. As our preparations, the optimal estimates as well as the optimal leading terms for the linearized model are derived by performing the Wentzel–Kramers–Brillouin (WKB) analysis and the Fourier analysis. Then, under some conditions on the power p$p$ of nonlinearity, we demonstrate global (in time) existence of small data Sobolev solutions with different regularities to the nonlinear model by applying some fractional‐order interpolations, where the optimal growth (n=2$n=2$) and decay (n⩾3$n\geqslant 3$) estimates of solutions for large time are given. Simultaneously, we get a new large time asymptotic profile of global (in time) solutions. These results imply some influence of dispersion and dissipation on qualitative properties of solution.

Suggested Citation

  • Wenhui Chen & Hiroshi Takeda, 2025. "Large time behavior for the nonlinear dissipative Boussinesq equation," Mathematische Nachrichten, Wiley Blackwell, vol. 298(8), pages 2770-2793, August.
    • Handle: RePEc:bla:mathna:v:298:y:2025:i:8:p:2770-2793
    DOI: 10.1002/mana.70015
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