On an asymptotic expansion for porous media flow of Carreau fluids

  • Porous media flow of polymers with Carreau law viscosities and their application to enhanced oil recovery (EOR) is considered. Applying the homogenization method leads to a nonlinear two-scale problem. In case of a small difference between the Carreau and the Newtonian case an asymptotic expansion based on the small deviation of the viscosity from the Newtonian case is introduced. For uni-directional pressure gradients, which is a reasonable assumption in applications like EOR, auxiliary problems to decouple the micro- from the macrovariables are derived. The microscopic flow field obtained by the proposed approach is compared to the solution of the two-scale problem. Finite element calculations for an isotropic and an anisotropic pore cell geometries are used to validate the accuracy and speed-up of the proposed approach. The order of accuracy has been studied by performing the simulations up to the third order expansion for the isotropic geometry.

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Verfasserangaben:Thomas Götz, Hanna Parhusip
URN (Permalink):urn:nbn:de:hbz:386-kluedo-13473
Schriftenreihe (Bandnummer):Berichte der Arbeitsgruppe Technomathematik (AGTM Report) (260)
Sprache der Veröffentlichung:Englisch
Jahr der Fertigstellung:2004
Jahr der Veröffentlichung:2004
Veröffentlichende Institution:Technische Universität Kaiserslautern
Datum der Publikation (Server):09.09.2004
Freies Schlagwort / Tag:Carreau law; porous media flow; two-scale expansion
Fachbereiche / Organisatorische Einheiten:Fachbereich Mathematik
DDC-Sachgruppen:5 Naturwissenschaften und Mathematik / 510 Mathematik
MSC-Klassifikation (Mathematik):76-XX FLUID MECHANICS (For general continuum mechanics, see 74Axx, or other parts of 74-XX) / 76Sxx Flows in porous media; filtration; seepage / 76S05 Flows in porous media; filtration; seepage
Lizenz (Deutsch):Standard gemäß KLUEDO-Leitlinien vor dem 27.05.2011