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arXiv 2401.02599math.AP
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非牛顿 Stokes-Transport 系统的弱解

Weak Solutions for a non-Newtonian Stokes-Transport System

Dimitri Cobb, Geoffrey Lacour

AI总结:

本文研究悬浮于 Stokes 流体中的非牛顿 Stokes-Transport 系统,通过结合 DiPerna-Lions 理论与 Minty 技巧,克服高度非线性困难,证明了临界 Lebesgue 空间下全局弱解的存在性。

摘要:

在本文中,我们研究了一个非牛顿 Stokes-Transport 系统。这组 PDE 被引入作为描述悬浮在 Stokes 流体中的粒子云行为的模型,它是双曲方程(Transport)与非线性椭圆方程(非牛顿 Stokes)之间的非线性耦合,因此可被视为一个主动标量方程。我们证明了在临界 Lebesgue 空间中具有初始数据的全局弱解的存在性。为了克服该问题的高度非线性方面所引入的困难,我们采用了 DiPerna-Lions 的输运方程理论与 Minty 的椭圆方程技巧相结合的方法。

英文摘要:

In this article, we study a non-Newtonian Stokes-Transport system. This set of PDEs was introduced as a model for describing the behavior of a cloud of particles in suspension in a Stokes fluid, and is a nonlinear coupling between a hyperbolic equation (Transport) and a nonlinear elliptic equation (non-Newtonian Stokes), and as such can be considered as an active scalar equation. We prove the existence of global weak solutions with initial data in critical Lebesgue spaces. In order to overcome the difficulties introduced by the highly nonlinear aspect of this problem, we resort to a combination of DiPerna-Lions theory of transport equations and Minty's trick for elliptic equations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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