Strong convergence of a vector-BGK model to the incompressible Navier-Stokes equations via the relative entropy method

被引:7
|
作者
Bianchini, Roberta [1 ,2 ]
机构
[1] UMPA, Ecole Normale Super Lyon, UMR CNRS ENSL 5669, 46 Allee Italie, F-69364 Lyon 07, France
[2] CNR, Ist Applicaz Calcolo Mauro Picone, Via Taurini 19, I-000185 Rome, Italy
关键词
Vector-BGK models; Discrete-velocity BGK models; Incompressible Navier-Stokes equations; Dissipative entropy; Relative entropy; Diffusive relaxation; DISCRETE KINETIC APPROXIMATION; DISSIPATIVE HYPERBOLIC SYSTEMS; FLUID DYNAMIC LIMITS; RELAXATION SCHEMES; CONSERVATION-LAWS; GLOBAL EXISTENCE; SMOOTH SOLUTIONS;
D O I
10.1016/j.matpur.2019.04.004
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
The aim of this paper is to prove the strong convergence of the solutions to a vector-BGK model under the diffusive scaling to the incompressible Navier-Stokes equations on the two-dimensional torus. This result holds in any interval of time [0, T], with T > 0. We also provide the global in time uniform boundedness of the solutions to the approximating system. Our argument is based on the use of local in time H-s-estimates for the model, established in a previous work, combined with the L-2-relative entropy estimate and the interpolation properties of the Sobolev spaces. (C) 2019 Elsevier Masson SAS. All rights reserved.
引用
收藏
页码:280 / 307
页数:28
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