This paper presents the frequency domain method to solve linear simultaneous heat and moisture transfer equations of porous building envelope in the hygroscopic range, discusses the method of deriving the transmission and admittance matrices of linear simultaneous heat and moisture transfer system of wall, gives their explicit expressions and proves their characteristics.

A numerical simulation was conducted to investigate the gas-liquid heat and mass concurrent transfer in the vertical pipe of Texaco type coal-water slurry gasifier, using volume of fluid(VOF) multiphase flow model and the species transport model of the gas phase.