Long time stability of a classical efficient scheme for two dimensional Navier-Stokes equations

Details Long time stability of a classical efficient scheme for two dimensional Navier-Stokes equations Long time stability of a classical efficient scheme for two dimensional Navier-Stokes equations

2011-05-22

arxiv.org/abs/1105.4349v1

Mathematics

Numerical Analysis

Scientific paper

We prove that a popular classical implicit-explicit scheme for the 2D incompressible Navier--Stokes equations that treats the viscous term implicitly while the nonlinear advection term explicitly is long time stable provided that the time step is sufficiently small in the case with periodic boundary conditions. The long time stability in the $L^2$ and $H^1$ norms further leads to the convergence of the global attractors and invariant measures of the scheme to those of the NSE itself at vanishing time step. Both semi-discrete in time and fully discrete schemes with either Galerkin Fourier spectral or collocation Fourier spectral methods are considered.

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