Modélisation du transfert de chaleur et de masse : impact de la perméabilité à l'air et de l'hystérésis pour le béton de chanvre

Abstract

National audienceIn the context of hygrothermical caracterization of environmentally friendly materials, a non hysteretic 1D model, for describing mass and heat transfer is implemented with COMSOL. The model is validated thanks to an international benchmark HAMSTAD WP2. Numerical and experimental results from hemp concrete wall submitted to real climatic solicitations are compared. The poor agreement between these one conducts to analyse the air transfer through the wall and the modeling of sorption isotherm hysteresis