Convex integration and phenomenologies in turbulence

By T. Buckmaster, Vlad Vicol. EMS Surveys in Mathematical Sciences, 2019

177 citations recorded by the source corpus.

In this review article we discuss a number of recent results concerning wild weak solutions of the incompressible Euler and Navier-Stokes equations. These results build on the groundbreaking works of De Lellis and Szekelyhidi Jr., who extended Nash's fundamental ideas on $C^1$ flexible isometric embeddings, into the realm of fluid dynamics. These techniques, which go under the umbrella name convex integration, have fundamental analogies the phenomenological theories of hydrodynamic turbulence. Mathematical problems arising in turbulence (such as the Onsager conjecture) have not only sparked new interest in convex integration, but certain experimentally observed features of turbulent flows (such as intermittency) have also informed new convex integration constructions. First, we give an elementary construction of nonconservative $C^{0+}_{x,t}$ weak solutions of the Euler equations, first proven by De Lellis-Szekelyhidi Jr.. Second, we present Isett's recent resolution of the flexible side of the Onsager conjecture. Here, we in fact follow the joint work of De Lellis-Szekelyhidi Jr. and the authors of this paper, in which weak solutions of the Euler equations in the regularity class $C^{\frac 13-}_{x,t}$ are constructed, attaining any energy profile. Third, we give a concise proof of the authors' recent result, which proves the existence of infinitely many weak solutions of the Navier-Stokes in the regularity class $C^0_t L^{2+}_x \cap C^0_t W^{1,1+}_x$. We conclude the article by mentioning a number of open problems at the intersection of convex integration and hydrodynamic turbulence.

Subfields: Applied Mathematics, Mathematical Physics

View Paper: https://www.semanticscholar.org/paper/111b2817a8499c87d88be1ef8942385b00b04360

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Citations in the corpus

Non-uniqueness of Leray solutions of the forced Navier-Stokes equations (2021, methodology): “Their proof introduces the important tool of intermittency and builds on the fundamental works for the Euler equations and the proof of the Onsager conjecture [31, 9] (see [11, 10] for further connections to fluid turbulence).”
On Ill‐ and Well‐Posedness of Dissipative Martingale Solutions to Stochastic 3D Euler Equations (2020, methodology): “The method was then further developed and successfully applied to a number of other fluid dynamics models, in particular to the Navier–Stokes system in three dimensions by Buckmaster and Vicol [14] and Buckmaster, Colombo, and Vicol [12], which permitted proving nonuniqueness for weak solutions not ”