Formulacao pelo método dos resíduos pesados de um elemento finito de nós coincidentes para modelar a transferencia de calor na interface de contacto entre dois meios distintos

Abstract

A weighted residual formulation of a finite element with coincident nodes has been done to model the heat transfer at the contact interface between two distinct mediums. The finite element modelling of that interface requires the use of very thin elements, which are responsible for some numerical instabilities. With the special finite element with coincident nodes we pretend to avoid the occurence of this numerical ill-conditioning. The results obtained with this special finite element, in heat conduction problems, are compared with those obtained with the height node quadric element and with the result from other authors and the advantage of its use is shown.

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