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arXiv 2301.01401math.NAcs.NA
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Navier-斯托克斯方程的相容分裂GSAV格式的误差估计

Error estimate of a consistent splitting GSAV scheme for the Navier-Stokes equations

Xiaoli Li, Jie Shen

摘要:

本文对求解Navier-斯托克斯方程无滑移边界条件的一阶半离散(在时间上)相容分裂格式与广义标量辅助变量(GSAV)方法进行了严格的误差分析。该格式是线性的,无条件稳定的,并且在每个时间步只需要求解一系列Poisson型方程。通过使用GSAV方法的内置无条件稳定性,我们得到最优的全局(分别)。本地)在时间上的误差估计在两个(分别是三维情况下的速度和压力近似。

英文摘要:

We carry out a rigorous error analysis of the first-order semi-discrete (in time) consistent splitting scheme coupled with a generalized scalar auxiliary variable (GSAV) approach for the Navier-Stokes equations with no-slip boundary conditions. The scheme is linear, unconditionally stable, and only requires solving a sequence of Poisson type equations at each time step. By using the build-in unconditional stability of the GSAV approach, we derive optimal global (resp. local) in time error estimates in the two (resp. three) dimensional case for the velocity and pressure approximations.

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