A variable timestepping algorithm for the unsteady Stokes/Darcy model
Abstract
This report considers a variable step time discretization algorithm proposed by Dahlquist, Liniger and Nevanlinna and applies the algorithm to the unsteady Stokes/Darcy model. Although long-time forgotten and little explored, the algorithm performs advantages in variable timestep analysis of various fluid flow systems, including the coupled Stokes/Darcy model. The paper proves that the approximate solutions to the unsteady Stokes/Darcy model are unconditionally stable due to the G-stability of the algorithm. Also variable time stepping error analysis follows from the combination of G-stability and consistency of the algorithm. Numerical experiments further verify the theoretical results, demonstrating the accuracy and stability of the algorithm for time-dependent Stokes/Darcy model.
Cite
@article{arxiv.2007.03801,
title = {A variable timestepping algorithm for the unsteady Stokes/Darcy model},
author = {Yi Qin and Yanren Hou and Wenlong Pei},
journal= {arXiv preprint arXiv:2007.03801},
year = {2020}
}