An interface strip preconditioner for domain decomposition methods: application to hydrology
نویسندگان
چکیده
منابع مشابه
An Interface Strip Preconditioner for Domain Decomposition Methods
A preconditioner for iterative solution of the interface problem in Schur Complement Domain Decomposition Methods is presented. This preconditioner is based on solving a problem in a narrow strip around the interface. It requires much less memory and computing time than classical Neumann-Neumann preconditioner and its variants, and handles correctly the flux splitting among subdomains that shar...
متن کاملAn Interface Strip Preconditioner for Domain Decomposition Methods: Application to the Coupled Surface and Groundwater Flow
In this paper, the efficiency of a parallelizable preconditioner for Domain Decomposition Methods in the context of the solution of non-symmetric linear equations arising from the discretization of the conservation laws in hydrology (e.g., the coupled surface and sub-surface flow over a freatic acuifer) is investigated. The Interface Strip Preconditioner (IS) proposed is based on solving a prob...
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We present a new parallelizable preconditioner that is used as the local component for a two-level preconditioner similar to BPS. On 2D model problems that exhibit either high anisotropy or discontinuity, we demonstrate its attracting numerical behaviour and compare it to the regular BPS. Finally, to alleviate the construction cost of this new preconditioner, that requires the explicit computat...
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In this paper, some pathologies found for simple tests solved by means of preconditioned full iterative schemes are presented. According to these results (Sections 4 and 5), the accuracy deterioration observed should be considered as a warning for the nal application given to these solutions. Even though it is well known that full iterative solvers are not the best selection for comparison, the...
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ژورنال
عنوان ژورنال: International Journal for Numerical Methods in Engineering
سال: 2005
ISSN: 0029-5981,1097-0207
DOI: 10.1002/nme.1258