Transient analysis of thermal and moisture transfer in building materials

This paper aims to identify the transient temperature and humidity distribution during the coupled heat and moisture transfer in porous building materials. To this end, the Laplace transform and finite-difference method were combined into a hybrid numerical method, after the preliminary discussion on the coupled heat and moisture transfer in building materials. Then, the governing equations of heat and moisture transfer in porous materials were solved by the hybrid numerical method. Under the boundary conditions, the general solution of the governing equation was obtained considering the coupling of temperature and humidity on the inner and outer surfaces of building materials. The inversion of the real domain was accomplished by matrix operation and Fourier sequence. The research provides practical methods and empirical data for further research and engineering practice, especially for buildings in humid regions.