Asymptotic stability of the composite wave of rarefaction wave and contact wave to nonlinear viscoelasticity model with non-convex flux

In this paper, we consider the wave propagations of viscoelastic materials, which has been derived by Taiping-Liu to approximate the viscoelastic dynamic system with fading memory (see [T.P.Liu(1988)\cite{LiuTP}]) by the Chapman-Enskog expansion. By constructing a set of linear diffusion waves coupl...

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Published in:arXiv.org 2024-09
Main Authors: Guo, Zhenhua, Hou, Meichen, Qiu, Guiqin, Xu, Lingda
Format: Article
Language:English
Subjects:
Contact stresses
Diffusion waves
Dynamical systems
Hyperbolic functions
Hyperbolic systems
Rarefaction
Stability
Stress functions
Viscoelastic materials
Viscoelasticity
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Summary:In this paper, we consider the wave propagations of viscoelastic materials, which has been derived by Taiping-Liu to approximate the viscoelastic dynamic system with fading memory (see [T.P.Liu(1988)\cite{LiuTP}]) by the Chapman-Enskog expansion. By constructing a set of linear diffusion waves coupled with the high-order diffusion waves to achieve cancellations to approximate the viscous contact wave well and explicit expressions, the nonlinear stability of the composite wave is obtained by a continuum argument. It emphasis that, the stress function in our paper is a general non-convex function, which leads to several essential differences from strictly hyperbolic systems such as the Euler system. Our method is completely new and can be applied to more general systems and a new weighted Poincaré type of inequality is established, which is more challenging compared to the convex case and this inequality plays an important role in studying systems with non-convex flux.
ISSN:2331-8422