کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6928575 1449341 2018 27 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Approximate multiscale flow solver for unstructured pore networks
ترجمه فارسی عنوان
حلال جریان تقریبا چندساله برای شبکه های منفرد ساختار یافته
کلمات کلیدی
چند منظوره، مدل های شبکه، رسانه های متخلخل، جریان دو مرحله ای،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
چکیده انگلیسی
Pore-scale simulations of multiphase flow in porous media are useful in understanding the relations between macroscopic variables relevant in many applications. It is critical that simulation domains are large enough to be considered representative elementary volumes for the relevant macroscopic quantities such as relative permeability, macroscopic capillary pressure and average saturation. However, multiphase pore-scale solvers, such as dynamic flow solvers for pore network models, are typically computationally expensive due to the required solution of a global pressure problem at every time-step. In this paper, an approximate multiscale flow solver is presented, which overcomes this limitation. The solver is applicable to arbitrary unstructured pore networks and consists of three main steps. First, the global pressure problem is solved using the multiscale finite volume (MSFV) method in combination with the multiscale restricted-smoothed basis (MsRSB) prolongation operator. The computed pressure field leads to conservative fluxes across pre-defined subnetwork boundaries. Second, these conservative fluxes are used as boundary conditions to solve local problems on the subnetworks. Third, once these local problems are solved, the subnetworks are synchronized. Validation studies are presented and results obtained using the multiscale solver are compared to results obtained using an existing dynamic network flow solver.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Computational Physics - Volume 372, 1 November 2018, Pages 62-79
نویسندگان
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