Low Mach number limit for the global large solutions to the 2D Navier--Stokes--Korteweg system in the critical \widehatL^p framework

2024/10/11 by Mikihiro Fujii, Yang Li, Fujii, Mikihiro +1 · 3 citations
Mathematics · Engineering · #Navier-Stokes equation solutions #Computational Fluid Dynamics and Aerodynamics #Fluid Dynamics and Turbulent Flows

paper · pdf · doi:10.48550/arxiv.2410.08493

Abstract

In the present paper, we consider the compressible Navier--Stokes--Korteweg system on the 2D whole plane and show that a unique global solution exists in the scaling critical Fourier--Besov spaces for arbitrary large initial data provided that the Mach number is sufficiently small. Moreover, we also show that the global solution converges to the 2D incompressible Navier--Stokes flow in the singular limit of zero Mach number. The key ingredient of the proof lies in the nonlinear stability estimates around the large incompressible flow via the Strichartz estimate for the linearized equations in Fourier--Besov spaces.

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