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arXiv 2009.13085math.APmath.OC
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局部Cahn-Hilliard-Navier-Stokes系统值函数的粘性解的存在性与唯一性

Existence and Uniqueness of viscosity solutions of Value function of Local Cahn-Hilliard-Navier-Stokes system

Sheetal Dharmatti, Perisetti Lakshmi Naga Mahendranath

AI总结:

本文针对二维有界区域带正则势的局部Cahn-Hilliard-Navier-Stokes系统的最优控制问题,定义值函数并证明其满足动态规划原理,通过粘性解方法证明值函数是对应无限维Hamilton-Jacobi-Bellman方程的唯一粘性解。

摘要:

本文研究二维有界区域中带正则势的局部Cahn-Hilliard-Navier-Stokes方程。我们构建了分布式最优控制问题,即在受控局部Cahn-Hilliard-Navier-Stokes系统约束下最小化合适的代价泛函,并定义了相应的值函数,证明了该值函数满足动态规划原理。由于值函数缺乏光滑性,我们采用粘性解方法来求解无限维Hamilton-Jacobi-Bellman方程的对应解,证明了值函数是该Hamilton-Jacobi-Bellman方程的唯一粘性解,且粘性解的唯一性通过比较原理得以确立。

英文摘要:

In this work, we consider the local Cahn-Hilliard-Navier-Stokes equation with regular potential in two dimensional bounded domain. We formulate distributed optimal control problem as the minimization of a suitable cost functional subject to the controlled local Cahn-Hilliard-Navier- Stokes system and define the associated value function. We prove the Dynamic Programming Principle satisfied by the value function. Due to the lack of smoothness properties for the value function, we use the method of viscosity solutions to obtain the corresponding solution of the infinite dimensional Hamilton-Jacobi-Bellman equation. We show that the value function is the unique viscosity solution of the Hamilton-Jacobi-Bellman equation. The uniqueness of the viscosity solution is established via comparison principle.

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