Acoplamento de interface Iterativo MEF—MEFE para problemas do tipo sólido-fluido no domínio do tempo

Abstract

In this work, an iterative interface coupling method with an efficient and precise time subcycling scheme is proposed. It is applied to solid-fluid type problems discretized respectively by classical finite element method (FEM) and spectral finite element method (SFEM), additionally, an improvement in the subcycling scheme is proposed so as not to require relaxation methods to converge. Applying the SFEM in subdomains with low distorted geometries one can take advantage of the high numerical precision with low cost of storage offered by the method, while it is possible to apply the FEM in subdomains with complex geometries, adding versatility to the method. Many numerical examples are presented and analyzed here to show the accuracy and potentiality of the proposed numerical formulations.