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arXiv 1502.00964math.APmath.OCphysics.flu-dynphysics.geo-ph
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三维Brinkman-Forchheimer-Extended Darcy模式的连续数据同化

Continuous data assimilation for the three-dimensional Brinkman-Forchheimer-extended Darcy model

Peter A. Markowich, Edriss S. Titi, Saber Trabelsi

摘要:

本文介绍并分析了三维Brinkman-Forchheimer-extended Darcy(3D BFeD)多孔介质模型的连续数据同化算法。当流动速度太大而达西定律无效时,该模型被认为是准确的,并且另外孔隙度不是太小。该算法的灵感来自于为耗散系统设计有限参数反馈控制的思想。它旨在通过结合确定性或噪声测量和观测来获得对物理系统状态的改进估计。具体地,该算法涉及反馈控制,该反馈控制将近似解的大尺度向与空间测量相关联的参考解的大尺度轻推。在本文的第一部分中,我们给出了三维BFeD方程组弱解和强解的存在唯一性的一些结果。第二部分是资料同化算法的设置和收敛性分析。

英文摘要:

In this paper we introduce and analyze an algorithm for continuous data assimilation for a three-dimensional Brinkman-Forchheimer-extended Darcy (3D BFeD) model of porous media. This model is believed to be accurate when the flow velocity is too large for Darcy's law to be valid, and additionally the porosity is not too small. The algorithm is inspired by ideas developed for designing finite-parameters feedback control for dissipative systems. It aims to obtaining improved estimates of the state of the physical system by incorporating deterministic or noisy measurements and observations. Specifically, the algorithm involves a feedback control that nudges the large scales of the approximate solution toward those of the reference solution associated with the spatial measurements. In the first part of the paper, we present few results of existence and uniqueness of weak and strong solutions of the 3D BFeD system. The second part is devoted to the setting and convergence analysis of the data assimilation algorithm.

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