Suitable weak solutions of the Navier-Stokes equations constructed by a space-time numerical discretization

摘要

We prove that weak solutions obtained as limits of certain numerical space-time discretizations are suitable in the sense of Scheffer and Caffarelli-Kohn-Nirenberg. More precisely, in the space-periodic setting, we consider a full discretization in which the theta-method is used to discretize the time variable, while in the space variables we consider appropriate families of finite elements. The main result is the validity of the so-called local energy inequality. (C) 2018 Elsevier Masson SAS. All rights reserved.