摘要
描述了一种计算裂隙多孔介质中变饱和渗流的广义等效连续体方法。这种方法忽略裂隙的毛细作用,设定一个与某孔隙饱和度相对应的综合饱和度极限值,并假定:(1)如果裂隙多孔介质的综合饱和度小于该极限值,水只在孔隙中存在并流动,而裂隙中则没有水的流动;(2)如果综合饱和度等于或大于该极限值,水将进入裂隙,并在裂隙内运动。分析比较了等效连续体模型的不同计算方法,并给出了一个模拟裂隙岩体中变饱和渗流与传热耦合问题的应用算例。结果表明,所述方法具有一般性,可以有效地模拟裂隙多孔介质中变饱和渗流的基本特征。
A generalized equivalent-continuum method is presented for calculating variably saturated seepage flow in fractured porous media. The model neglects fracture capillarity, sets up a threshold composite saturation value that corresponds to a prescribed pore saturation, and assume: (1) if the composite saturation in a fractured porous medium is less than the threshold saturation, water flow can take place only in the pores, and the fractures are free from water; (2) otherwise, if the composite saturation exceeds the threshold value, water enters and flows inside of the fractures. Various equivalent-continuum calculation methods are analyzed and compared. In order to illustrate the features of the proposed method, a calculation example is provided for modeling of coupled water and heat transport in variably saturated fractured rocks. The results indicate that the presented method is relatively general, and can be employed to model the main features of variably saturated seepage flow in fractured porous media.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2005年第5期750-754,共5页
Rock and Soil Mechanics
关键词
裂隙多孔介质
等效连续体
变饱和渗流
fractured porous media
equivalent continuum
variably saturated seepage flow
