Characteristics of Soil Temperature Field of Canal Based on Porous Media Theory
TANG Shaorong
WANG Hongyu
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.
Keywords：frozentemperature fieldporous media theorysmall integral U-shaped canal
Publication Date：2017-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 87-92 )