Author(s)

N. Simões, F. Branco and A. Tadeu

Abstract

Definition of two-dimensional condensation via BEM N. Simoes, F. Branco & A. Tadeu Civil Engineering Department, Faculty of Sciences and Technology, University of Coimbra, Portugal Abstract Condensation areas across two-dimensional elements are defined using an iterative process where the Boundary Element Method (BEM) is employed to evaluate the steady-state heat conduction (and vapour saturation pressure), and vapour diffusion. For each iteration, a small sub-domain is identified where condensation occurs, i.e. where the vapour pressure is greater than the vapour saturation pressure. The vapour pressure is made to equal the vapour saturation pressure along this sub-domain, using the Glaser approach. A new vapour equilibrium is then defined using the BEM solution. This iterative process is repeated until there is no sub-domain across the element where vapour pressure is greater than vapour saturation pressure. 1 Introduction Condensation in building elements is of

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