Efficient Linear Solvers for Mortar Finite-Element Method

Efficient linear solvers for mortar finite-element method are studied. An analysis of a brushless DC motor shows that proposed preconditioners improve the convergence to the solutions of linear systems with and without Lagrange multipliers

I. Introduction

The mortar Finite-Element Method (FEM) [1], [2] is a domain decomposition approach that allows mesh nonconformity at the domain interfaces. It can provide an efficient formulation for analysis of rotating machinery using a sliding mesh [3]–[5].