Hydrodynamic permeability of staggered and non-staggered regular arrays of squares

[摘要] ENGLISH ABSTRACT: This work entails an analysis of two-dimensional Newtonian flow through a prismatic arrayof squares. Both in-line and staggered configurations are investigated, as well as the verylow velocity Darcy regime, where Stokes' flow predominates, and the Forchheimer regime,where interstitial inertial effects such as recirculation are present. As point of departure tworecently developed pore-scale models are discussed and their results compared to Stokes' flowcomputational analysis for flow through regular arrays of rectangles. The commercial CFXcode is also used to analyse the problem and to determine the accuracy of the assumptionsused for the development of the pore-scale models. Finally an improvement is suggested tothe RRUC model towards more accurate prediction of permeabilities, especially for porositiesbelow 75%, and whereby its quantitative predictive capability is thus enhanced considerably.

[发布机构] Stellenbosch University