Flow in Binary Porous Media: Viscoous Dissipation

I. COLECCHIO PUA; A. BOSCHAN; B. NOETINGER; A. D. OTERO

Album of Porous Media. Structure and Dynamics

Springer Nature

Lugar: Berlín; Año: 2023; p. 125 - 125

low and transport in porous media strongly depend on the connectivity of the high permeability component. Frequently, small critical regions determine the overall flow behavior. Energy dissipation approaches make it possible to detect these regions, yielding more accurate effective propertiescite{Colecchio_2020}.We’ve simulated flow in a synthetic binary medium (b) with a high conductivity ($k_{high} = 100 m/day$) and a low one ($k_{low} = 0.01 m/day$). No-flow boundary conditions are applied in the vertical boundaries while a pressure gradient exists between the inlet (bottom) and the outlet (top). The resulting energy dissipations maps are shown in (a) (with $k_{high}$: $lacksquare$, $k_{low}$ : $square$), and in (c) (with $k_{high}$: $square$, $k_{low}$ : $lacksquare$). Zooms over a small critical region are shown in the bottom row (d, e, f).When $k_{high}$ paths connect inlet and outlet (i.e. when percolation of the $k_{high}$ component occurs) energy dissipation is distributed mostly along flow channels (a, d). Otherwise, channelization is absent and energy dissipation is distributed along barriers (c, f).