کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
497857 862946 2015 26 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A solution to transient seepage in unsaturated porous media
ترجمه فارسی عنوان
یک راه حل برای گذر گذرا در رسانه متخلخل اشباع نشده
کلمات کلیدی
تجزیه و تحلیل گذرا، شرایط مرزی یکطرفه، سطح آزاد، نفوذ، پودینگ خاک های غیر اشباع
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
چکیده انگلیسی

This paper presents a solution to seepage problems in porous media considering the complete time-dependent transition from fully saturation to partially unsaturated states and vice-versa; therefore capturing the evolution of the free surface (region with zero liquid pressure). A simple and efficient method to implement the seepage face boundary condition for finite element solutions is proposed. The method is based on an analogy to unilateral constraints in Plasticity and, in essence, adds some extra unknowns to the finite elements with boundaries near the seepage face. The free surface is thus automatically predicted. The resulting enriched elements can also account for ponding or infiltration at the external surface. The solution is accomplished by considering the theory of porous media with slightly compressible liquids. The formulation can easily accommodate liquid retention models with hysteresis. Verification examples are presented in addition to simulations of drainage and infiltration illustrating the capabilities of the proposed solution.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Methods in Applied Mechanics and Engineering - Volume 285, 1 March 2015, Pages 791–816
نویسندگان
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