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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 Sorptivity ： ウィキペディア英語版 Sorptivity In 1957 John Philip introduced the term sorptivity and defined it as ''a measure of the capacity of the medium to absorb or desorb liquid by capillarity''. According to C Hall and W D Hoff, the sorptivity ''expresses the tendency of a material to absorb and transmit water and other liquids by capillarity.'' The sorptivity is widely used in characterizing soils and porous construction materials such as brick, stone and concrete. Calculation of the true sorptivity required numerical iterative procedures dependent on soil water content and diffusivity. John R. Philip (1969) showed that sorptivity can be determined from horizontal infiltration where water flow is mostly controlled by capillary absorption: $I\; =\; S\; \backslash sqrt\backslash$ where ''S'' is sorptivity, ''I'' is the cumulative infiltration at time, ''t''. For vertical infiltration, Philip's solution is adapted using a parameter A1. This results in the following equations, which are valid for short times: cumulative: $I\; =\; S\; \backslash sqrt\backslash \; +\; A\_1\; t$ rate: $i\; =\; 0.5\; S/\; \backslash sqrt\backslash \; +\; A\_1$ where the sorptivity S is defined (when a sharp wetting front Lf exists) as: $S(\backslash theta\_0\; ,\; \backslash theta\_i)\; =\; \backslash frac\{t^\{1/2\}\}$ ==References== 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「Sorptivity」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.