摘要
以Alaska北极美国Barrow气象观测站的地温观测资料和土壤热物理参数为基础,以伴有相变问题的一维热传导方程的有限差分法为工具,在考虑和忽略未冻水2种情形下模拟了Barrow地区0.29,0.50和1.0 m深处的地温值,并与观测值进行了比较.计算结果表明,未冻水对冻土热状况数值模拟结果有很大影响.
Based on the observed ground temperature data and the soil thermal and physical properties derived from Barrow,Alaska,this paper simulates the ground temperatures at depths of 0.29,0.50 and 1.0m at Barrow,by using a one-dimensional finite difference model for phase change problems. Two simulation cases were conducted by considering the unfrozen water and neglecting the unfrozen water. The simulated and measured soil temperatures at different depths also were compared. The calculated results show that unfrozen water has strong influence on the numerical simulation results of permafrost thermal regime.
出处
《肇庆学院学报》
2007年第2期18-22,共5页
Journal of Zhaoqing University
基金
广东省自然科学基金资助项目(04011600)
关键词
未冻水
相变热传导
有限差分法
显热容法
冻土
unfrozen water
heat conduction with phase change
finite difference method
equivalent heat capacity method
permafrost
