Numerical simulation of heat and moisture transfer in porous wall in underground caves

Presents a mathematical model described with temperature and relative humidity as driving potential for coupled heat and moisture transfer in porous wall materials. The model includes the transfer of liquid and vapor flow in porous materials simultaneously. A calculation program is developed based on the control equations discretized by using the control volume method. Simulates the heat and moisture transfer for wall in deeply-buried underground caves, and obtains the variation characteristics of temperature, relative humidity, and rate of heat and moisture flow. The results show that the time of heat transfer tending to the steady state is far shorter than that of moisture transfer.