From gas dynamics with large friction to gradient flows describing diffusion theories

Corrado Lattanzio, Athanasios Tzavaras

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Abstract

We study the emergence of gradient flows in Wasserstein distance as high friction limits of an abstract Euler flow generated by an energy functional. We develop a relative energy calculation that connects the Euler flow to the gradient flow in the diffusive limit regime. We apply this approach to prove convergence from the Euler-Poisson system with friction to the Keller-Segel system in the regime that the latter has smooth solutions. The same methodology is used to establish convergence from the Euler-Korteweg theory with monotone pressure laws to the Cahn-Hilliard equation.
Original languageEnglish (US)
Pages (from-to)261-290
Number of pages30
JournalCommunications in Partial Differential Equations
Volume42
Issue number2
DOIs
StatePublished - Dec 12 2016

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