کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4580425 1630154 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ground water contaminant transport by nondivergence-free, unsteady and nonstationary velocity fields
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Ground water contaminant transport by nondivergence-free, unsteady and nonstationary velocity fields
چکیده انگلیسی

SummaryPore flow velocity is assumed to be a nondivergence-free, unsteady, and nonstationary random function of space and time for ground water contaminant transport in a heterogeneous medium. The laboratory-scale stochastic contaminant transport equation is up scaled to field scale by taking the ensemble average of the equation by using the cumulant expansion method. A new velocity correction, which is a function of mean pore flow velocity divergence, is obtained due to strict second order cumulant expansion (without omitting any term after the expansion). The field scale transport equations under the divergence-free pore flow velocity field assumption are also derived by simplifying the nondivergence-free field scale equation. The significance of the new velocity correction term is investigated on a two dimensional transport problem driven by a density dependent flow.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volume 330, Issues 3–4, 15 November 2006, Pages 564–572
نویسندگان
,