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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Buckley–Leverett equation ： ウィキペディア英語版 Buckley–Leverett equation In fluid dynamics, the Buckley–Leverett equation is a conservation equation used to model two-phase flow in porous media. The Buckley–Leverett equation or the Buckley–Leverett ''displacement'' can be interpreted as a way of incorporating the microscopic effects due to capillary pressure in two-phase flow into Darcy's law. In a 1D sample (control volume), let $S(x,t)$ be the water saturation, then the Buckley–Leverett equation is :$\backslash frac\; =\; U(S)\backslash frac$ where :$U(S)\; =\; \backslash frac\; \backslash frac.$ $f$ is the fractional flow rate, $Q$ is the total flow, $\backslash phi$ is porosity and $A$ is area of the cross-section in the sample volume. ==Assumptions for validity== The Buckley–Leverett equation is derived for a 1D sample given * mass conservation * capillary pressure $p\_c(S)$ is a function of water saturation $S$ only * $\backslash mathrmp\_c/\backslash mathrmS\; =\; 0$ causing the pressure gradients of the two phases to be equal. * Flow is Linear * Flow is Steady-State * Formation is one Layer 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Buckley–Leverett equation」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.