Numerical Simulation Analysis of Heat and Mass Transfer under a Cannel in Freezing
An Weidong, Chen Xiaobai and Wu Ziwang (Lanzhou Institute of Glaciology and Geocryology, Chinese Academy of Sciences)
This paper presents the numerical simulation analysis of a two-dimensi onal nonlinear mathematical model for heat and moisture transfer in the saturated porous medium under a canal. By means of coefficient-effection of hysteresis implicit finit-difference scheme, the calculation results of the temperature and moisture of 2400 hour-freezing show that the movement of freezing isothermal ( frost front ) and moisture distribution are nonhomoge-neous in a canal section,and the moisture content is maximum and frost damage is serious.The calculated results are in a perfect agreement with depth minimum near the bottom of the canal slop where frost the data obtained in an observation station. The computational method presented might be introduced to the numerical solution of heat and moisturu transfer of embankments and cuttings in freezing.