کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6380516 1625615 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydraulic bridges in unsaturated coarse granular media: Influence of bridge size and conductivity on flow through clasts
ترجمه فارسی عنوان
پل های هیدرولیکی در رسانه های گرانولی درشت غلیظ: تاثیر اندازه پل و هدایت بر جریان از طریق کلاوس
کلمات کلیدی
جریان غیر اشباع، رسانه های درشت آب پیاز، جریان در مصالح، زباله معدن، شستشوی کوزه،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی
Unsaturated flow in coarse granular media must pass through hydraulic bridges (e.g., pendular water, porous connections) that form a physical connection between adjoining clasts. Previous studies suggest that volumetric flow through a porous clast (Q) will be linearly dependent on the cross-sectional area of the hydraulic bridges, and understate the importance of bridge conductivity. Numerical simulations were performed to explore steady-state flow through a spherical clast with identical bridges located at the top and bottom. The cross-sectional area of the bridges relative to that of the clast (Ar) was varied across six orders of magnitude. The ratio of hydraulic conductivity between bridges and clasts (Kb/Kc) was varied across 12 orders of magnitude to consider resistive, neutral, and conductive bridges. Results show that hydraulic bridges place a primary control on both Q and flux distribution within the clast. For neutral and conductive bridges (Kb/Kc ≥1), Ar is the dominant factor in determining Q, while Kb/Kc is the primary control for resistive bridges (Kb/Kc < 1). For all bridges, Q shows a non-linear dependency on both Ar and Kb/Kc. The intra-clast flow distribution shifts outwards as Ar increases. Conductive bridges promote this process and resistive bridges impede it.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Water Resources - Volume 96, October 2016, Pages 202-208
نویسندگان
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