Vanishing Vertical Viscosity in Two-Dimensional Anisotropic Navier-Stokes Equations with No-Slip Boundary Conditions: An $L^p$ result

TL;DR

This paper proves strong convergence of 2D anisotropic Navier-Stokes solutions to the inviscid limit in the $L^p$ norm, despite boundary condition mismatches, as vertical viscosity vanishes.

Contribution

It establishes the inviscid limit in $L^p$ norm for anisotropic Navier-Stokes equations with no-slip boundary conditions, addressing boundary mismatch challenges.

Findings

Strong convergence in $L^p$ norm as vertical viscosity approaches zero

Convergence holds for initial velocities in $H^2$

Addresses boundary condition mismatch issues

Abstract

This paper studies the inviscid limit problem for the two-dimensional Navier-Stokes equations with anisotropic viscosity. The fluid is assumed to be bounded above and below by impenetrable walls, with a no-slip boundary condition imposed on the bottom wall. For $H^2$ initial velocity, we establish strong convergence in the $L^p$ norm to the limiting problem as the vertical viscosity approaches zero, for any $2\leq p <\infty$. The main challenge lies in the mismatch of boundary conditions - specifically, the no-slip condition in the original problem versus the slip condition in the limiting problem.