Domain Decomposition with Nonmatching Grids: Augmented Lagrangian Approach

Patrick Le Tallec, Taoufik Sassi
1995 Mathematics of Computation  
We propose and study a domain decomposition method which treats the constraint of displacement continuity at the interfaces by augmented Lagrangian techniques and solves the resulting problem by a parallel version of the Peaceman-Rachford algorithm. We prove that this algorithm is equivalent to the fictitious overlapping method introduced by P.L. Lions. We also prove its linear convergence independently of the discretization step h , even if the finite element grids do not match at the
more » ... s. A new preconditioner using fictitious overlapping and well adapted to three-dimensional elasticity problems is also introduced and is validated on several numerical examples.
doi:10.2307/2153360 fatcat:ybu7ae347zcrndsxfetoppe3bq