Long time stability of four methods for splitting the evolutionary Stokes-Darcy problem into Stokes and Darcy subproblems

Authors:
William Layton;Hoang Tran;Xin Xiong
Affiliations:
-;-;-
Venue:
Journal of Computational and Applied Mathematics
Year:
2012

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Abstract

This report analyzes the long time stability of four methods for non-iterative, sub-physics, uncoupling for the evolutionary Stokes-Darcy problem. The four methods uncouple each timestep into separate Stokes and Darcy solves using ideas from splitting methods. Three methods uncouple sequentially while one is a parallel uncoupling method. We prove long time stability of four splitting based partitioned methods under timestep restrictions depending on the problem parameters. The methods include those that are stable uniformly in S"0, the storativity coefficient, for moderate k"m"i"n, the minimum hydraulic conductivity, uniformly in k"m"i"n for moderate S"0 and with no coupling between the timestep and the spacial meshwidth.