Perturbation Analysis of Two-Phase Infiltration

Perturbation Analysis of Two-Phase Infiltration
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两相渗透的扰动分析

DOI：
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发表时间：
1972
期刊：
影响因子：
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通讯作者：
H. Morel‐Seytoux
H. Morel‐Seytoux
中科院分区：
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文献类型：
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作者：
A. Noblanc;H. Morel‐Seytoux

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提出了对均匀多孔介质的一维渗透问题的分析处理。考虑了空气相和水相的运动以及空气的可压缩性。该过程假设饱和方程中的一些毛细管项可以忽略，而所有毛细管项都保留在未知总流量的积分方程中。针对涉及不同边界或初始条件或两者的多种情况获得渗透率曲线。与早期和更简单的程序的结果进行比较，证实了更简单的程序的有效性。建议放弃传统的非饱和流动方程，转而采用两相流方法。
An analytical treatment for the problem of one-dimensional infiltration into a homogeneous porous medium is presented. Movement of both the air phase and the water phase and compressibility of the air are considered. The procedure assumes that some capillary terms can be neglected in the saturation equation, whereas all capillary terms are retained in an integral equation for the unknown total flow. Infiltration rate curves are obtained for a number of situations involving different boundary or initial conditions or both. Comparisons are made with results of an earlier and simpler procedure, confirming the validity of the simpler procedure. It is recommended that the traditional unsaturated flow equation be abandoned in favor of the two-phase flow approach.