THE NONEQUILIBRIUM THERMODYNAMICS OF THE SOIL-WATER SYSTEM - A VARIATIONAL APPROACH

被引：8
|
作者：
DELRIO, JA [1 ]
DEHARO, ML [1 ]
VAZQUEZ, F [1 ]
机构：
[1] UNIV AUTONOMA CHAPINGO,AREA FIS,CHAPINGO 56230,MEXICO
来源：
JOURNAL OF NON-EQUILIBRIUM THERMODYNAMICS | 1992年 / 17卷 / 01期
关键词：
D O I：
10.1515/jnet.1992.17.1.67
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A variational principle for extended irreversible thermodynamics (Vazquez, F., del Rio, J.A., Rev. Mex. Fis., 35 (1990), 71) is reformulated to incorporate the spatial inhomogeneities of the non-conserved variables in their time evolution equations. This approach is applied to water transport through soils and an exact time evolution equation for the water flux is derived as an Euler-Lagrange equation. In the structure of this equation the Forchheimer correction of Darcy's Law (applied to non-stationary problems) can be identified.
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页码：67 / 76
页数：10
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