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arXiv 2307.04064math.APmath.OC
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一类非牛顿不可压缩粘性流体的局部零能控性

Local null controllability of a class of non-Newtonian incompressible viscous fluids

Pitágoras de Carvalho, Juan Límaco, Denilson Menezes, Yuri Thamsten

AI总结:

本文研究 Ladyzhenskaya 型非牛顿不可压缩粘性流体的局部零能控性,利用 Pontryagin 最小值原理和自举论证证明线性化 Stokes 问题光滑控制的存在性并推广到非线性情形,同时提出收敛的拟牛顿算法并通过数值实验验证。

摘要:

我们研究了一些非牛顿不可压缩粘性流动力学系统的零能控性。我们研究的主要模型由 O. A. Ladyzhenskaya 提出,但我们发展的技术也适用于其他具有剪切依赖粘性的流体。利用 Pontryagin 最小值原理,我们采用自举论证证明:只要初始数据具有足够的正则性,受迫线性化 Stokes 问题的充分光滑控制就存在。由此,我们将结果推广到非线性问题。作为副产品,我们设计了一种拟牛顿算法来计算状态和控制,并证明了该算法在适当意义下收敛。最后,我们以若干数值实验结束本文。

英文摘要:

We investigate the null controllability property of systems that mathematically describe the dynamics of some non-Newtonian incompressible viscous flows. The principal model we study was proposed by O. A. Ladyzhenskaya, although the techniques we develop here apply to other fluids having a shear-dependent viscosity. Taking advantage of the Pontryagin Minimum Principle, we utilize a bootstrapping argument to prove that sufficiently smooth controls to the forced linearized Stokes problem exist, as long as the initial data in turn has enough regularity. From there, we extend the result to the nonlinear problem. As a byproduct, we devise a quasi-Newton algorithm to compute the states and a control, which we prove to converge in an appropriate sense. We finish the work with some numerical experiments.

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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