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arXiv · 1907.01554

Global existence in critical spaces for non Newtonian compressible viscoelastic flows

Xinghong Pan·Jiang Xu·Yi Zhu
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Abstract

We are interested in the multi-dimentional compressible viscoelastic flows of Oldroyd type, which is one of non-Newtonian fluids exhibiting the elastic behavior. In order to capture the damping effect of the additional deformation tensor, to the best of our knowledge, the "div-curl" structural condition plays a key role in previous efforts. Our aim of this paper is to remove the structural condition and prove a global existence of strong solutions to compressible viscoelastic flows in critical spaces. The new ingredient lies in the introduction of effective flux $(θ,\mathcal{G})$, which enables us to capture the dissipation arising from \textit{combination} of density and deformation tensor. In absence of compatible conditions, the partial dissipation is found in non-Newtonian compressible fluids, which is weaker than that of usual Navier-Stokes equations.

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Xinghong Pan, Jiang Xu, Yi Zhu. 2020-03-16. Global existence in critical spaces for non Newtonian compressible viscoelastic flows. https://doi.org/10.1016/j.jde.2022.05.020

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