Implementation and Benchmarking of a 3D Hygrothermal Model in the COMSOL Multiphysics Software

Abstract

Many buildings physics problems are difficult to evaluate properly without looking at the problem in three dimensions. For instance, it can be difficult to assess moisture transport in a brick masonry wall segment as it consists of a relatively complex system of brick and mortar. Still, most hygrothermal simulations are likely done in 1D or 2D, but development in computer hardware and software makes 3D simulations easier accessible. This paper looks into benchmarking of a hygrothermal simulation model created in the COMSOL Multiphysics software. The results show COMSOL to have promising applicability for 3D hygrothermal simulations.