灌溉排水学报2017，Vol.36Issue(2)：87-92,6.DOI:10.13522/j.cnki.ggps.2017.02.014
基于多孔介质理论的渠道基土温度场特性研究
Characteristics of Soil Temperature Field of Canal Based on Porous Media Theory
摘要
Abstract
Considering the frozen soil as uniform and isotropous material,the porous media theory was used to determine thermal parameters of soil under different freezing situation.A two-dimensional variable coefficient mathematical model of soil temperature was established based on the heat conduction equation,and the tempera-ture field which varied with time and position was obtained by means of the fully implicit difference scheme and the alternating direction implicit method(ADI),then,the numerical modeling method was verified by the analyti-cal solution of soil column.The soil temperature under an small integral U-shaped canal was simulated and ac-corded with in-site observation well.The results showed that porous media theory could simplify the solution of nonlinear equation,the fully implicit difference scheme and ADI were suited for small canal;Because of irregular-ity of the shape of canal and two-dimensional boundary,the underground water level and heat flux had different influences on temperature under different position.The temperature of shady slope was lower than bottom of ca-nal generally,the frozen area was enlarged gradually and the temperature field was uniform,meanwhile,the freez-ing zone was non-uniform distribution.关键词
冻结/温度场/多孔介质理论/整体式小型U形渠道Key words
frozen/temperature field/porous media theory/small integral U-shaped canal分类
建筑与水利引用本文复制引用
唐少容,王红雨..基于多孔介质理论的渠道基土温度场特性研究[J].灌溉排水学报,2017,36(2):87-92,6.基金项目
国家自然科学基金项目(51269023) （51269023）
