168 citations · 394 across the 16 of their papers we have counts for
5 papers · 1 filter
Capillary-Driven Instability of Immiscible Fluid Interfaces Flowing in Parallel in Porous Media
Thomas Ramstad, Alex Hansen
When immiscible wetting and non-wetting fluids move in parallel in a porous medium, an instability may occur at sufficiently high capillary numbers so that interfaces between the f…
Flow in Rough Self-Affine Fractures Joints
José S. Andrade, Ascânio D. Araújo, Fernando A. Oliveira +1
We investigate viscous and non-viscous flow in two-dimensional self-affine fracture joints through direct numerical simulations of the Navier-Stokes equations. As a novel hydrodyna…
Failure and avalanches in complex networks
Jan Øystein Haavig Bakke, Alex Hansen, János Kertész
We study the size distribution of power blackouts for the Norwegian and North American power grids. We find that for both systems the size distribution follows power laws with expo…
Cluster evolution in steady-state two-phase flow in porous media
Thomas Ramstad, Alex Hansen
We report numerical studies of the cluster development of two-phase flow in a steady-state environment of porous media. This is done by including biperiodic boundary conditions in…
Crossover Behavior in Burst Avalanches of Fiber Bundles: Signature of Imminent Failure
Srutarshi Pradhan, Alex Hansen, Per C. Hemmer
Bundles of many fibers, with statistically distributed thresholds for breakdown of individual fibers and where the load carried by a bursting fiber is equally distributed among the…