Index Catalog // ScholarsArchive@OSU

Creator:: Peszyńska, Malgorzata and Showalter, Ralph E.
Abstract:: An upscaled elliptic-parabolic system of partial differential equations describing the multiscale flow of a single-phase incompressible fluid and transport of a dissolved chemical by advection and diffusion through a heterogeneous porous medium is developed without the usual assumptions of scale separation. After a review of homogenization results for the traditional...
Resource Type:: Article
Full Text:: advective transport as well as diffusion, it includes non-Fickian models of dispersion and works over a

Creator:: Peszynska, Malgorzata, Showalter, Ralph E., and Yi, Son -Young
Abstract:: In this paper, we consider an upscaled model describing the multiscale flow of a single-phase incompressible fluid and transport of a dissolved chemical by advection and diffusion through a heterogeneous porous medium. Unlike traditional homogenization or volume averaging techniques, we do not assume a good separation of scales. The new...
Resource Type:: Article
Full Text:: words. Upscaled model, double-porosity, memory terms, solute transport, non-separated scale, stability

Creator:: Trykozko, Anna, Peszynska, Malgorzata, and Dohnalik, Marek
Abstract:: The ability to evaluate the effective permeability of proppant packs is useful in predicting the efficiency of hydraulic fracture installations. In this paper we propose a computational approach combining microimaging data from X-ray computed microtomography, the simulations of flow at pore-scale, and an upscaling process which identifies the effective model...
Resource Type:: Article
Full Text:: , Predictions of non-Fickian solute transport in different classes of porous media using direct simulations on

Creator:: Peszynska, Malgorzata and Trykozko, Anna
Abstract:: We consider computational modeling of flow with small and large velocities at porescale and at corescale, and we address various challenges in simulation, upscaling, and modeling. While our focus is on voxel-based data sets from real porous media imaging, our methodology is verified first on synthetic geometries, and we analyze...
Resource Type:: Article
Full Text:: for this decrease, we propose a practical power-based fully anisotropic non-Darcy model at corescale

Creator:: Peszynska, Malgorzata, Trykozko, Anna, and Augustson, Kyle
Abstract:: This paper is included in the Proceedings, Part 1, of the International Conference on Computational Science 2009 (ICCS 2009) held in Baton Rouge, LA, USA, May 25-27, 2009.
Resource Type:: Article
Full Text:: porescale and Darcy and non- Darcy at mesoscale. Yet identification of a particular regime and of nonlinear

Creator:: Klein, Viviane and Peszynska, Malgorzata
Abstract:: Double-diffusion model is used to simulate slightly compressible fluid flow in periodic porous media as a macro-model in place of the original highly heterogeneous micro-model. In this paper, we formulate an adaptive two-grid numerical finite element discretization of the double-diffusion system and perform a comparison between the micro- and macro-model....
Resource Type:: Article
Full Text:: 209� is given by c � ∫ Γ1,3 k3∇yU · �n3ds. �3.5 We note that the general non-quasistatic case is

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