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arxiv: 1710.01579 · v2 · pith:44F7Y4FDnew · submitted 2017-10-04 · 🧮 math.AP · cs.NA· math.NA

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

classification 🧮 math.AP cs.NAmath.NA
keywords considerdiscretizationnumericalsolutionsspace-timesuitableweakappropriate
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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.

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