High-order ILU preconditioners for CFD problems

Abstract

This paper tests a number of incomplete lower-upper (ILU)-type preconditioners for solving indefinite linear systems, which arise from complex applications such as computational fluid dynamics (CFD). Both point and block preconditioners are considered. The paper focuses on ILU factorization that can be computed with high accuracy by allowing liberal amounts of fill-in. A number of strategies for enhancing the stability of the factorizations are examined. Copyright (C) 2000 John Wiley and Sons, Ltd.