کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4526162 1323818 2009 23 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Biofilms in porous media: Development of macroscopic transport equations via volume averaging with closure for local mass equilibrium conditions
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Biofilms in porous media: Development of macroscopic transport equations via volume averaging with closure for local mass equilibrium conditions
چکیده انگلیسی

In this work, we upscale a pore-scale description of mass transport in a porous medium containing biofilm to develop the relevant Darcy-scale equations. We begin with the pore-scale descriptions of mass transport, interphase mass transfer, and biologically-mediated reactions; these processes are then upscaled using the method of volume averaging to obtain the macroscale mass balance equations. We focus on the case of local mass equilibrium conditions where the averaged concentrations in the fluid and biological phases can be assumed to be proportional and for which a one-equation macroscopic model may be developed. We predict the effective dispersion tensor by a closure scheme that is solved for the cases of both simple and complex unit cells. The domain of validity of the approach is clearly identified, both theoretically and numerically, and unitless groupings indicating the domain of validity are reported.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Water Resources - Volume 32, Issue 3, March 2009, Pages 463–485
نویسندگان
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