کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10682841 | 1016225 | 2005 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Competition of gravity, capillary and viscous forces during drainage in a two-dimensional porous medium, a pore scale study
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Competition of gravity, capillary and viscous forces during drainage in a two-dimensional porous medium, a pore scale study Competition of gravity, capillary and viscous forces during drainage in a two-dimensional porous medium, a pore scale study](/preview/png/10682841.png)
چکیده انگلیسی
We have studied experimentally and numerically the displacement of a highly viscous wetting fluid by a non-wetting fluid with low viscosity in a random two-dimensional porous medium under stabilizing gravity. In situations where the magnitudes of the viscous-, capillary- and gravity forces are comparable, we observe a transition from a capillary fingering behavior to a viscous fingering behavior, when decreasing apparent gravity. In the former configuration, the vertical extension of the displacement front saturates; in the latter, thin branched fingers develop and rapidly reach breakthrough. From pressure measurements and picture analyzes, we experimentally determine the threshold for the instability, a value that we also predict using percolation theory. Percolation theory further allows us to predict that the vertical extension of the invasion fronts undergoing stable displacement scales as a power law of the generalized Bond number Boâ=BoâCa, where Bo and Ca are the Bond and capillary numbers, respectively. Our experimental findings are compared to the results of a numerical modeling that takes local viscous forces into account. Theoretical, experimental and numerical approaches appear to be consistent.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 30, Issue 6, May 2005, Pages 861-872
Journal: Energy - Volume 30, Issue 6, May 2005, Pages 861-872
نویسندگان
Grunde Løvoll, Yves Méheust, Knut Jørgen MÃ¥løy, Eyvind Aker, Jean Schmittbuhl,