Zobrazeno 1 - 10
of 627
pro vyhledávání: '"Hansen, Alex"'
Autor:
Hansen, Alex
The co-moving velocity is a new variable in the description of immiscible two-phase flow in porous media. It is the saturation-weighted average over the derivatives of the seepage velocities of the two immiscible fluids with respect to saturation. Ba
Externí odkaz:
http://arxiv.org/abs/2402.13826
Autor:
Lima, Henrique A., Luis, Edwin E. Mozo, Carrasco, Ismael S. S., Hansen, Alex, Oliveira, Fernando A.
We develop the hypothesis that the dynamics of a given system may lead to the activity being constricted to a subset of space, characterized by a fractal dimension smaller than the space dimension. We also address how the response function might be s
Externí odkaz:
http://arxiv.org/abs/2402.10167
The flow of yield stress fluids in porous media presents interesting complexity due to the interplay between the non-linear rheology and the heterogeneity of the medium. A remarkable consequence is that the number of flow paths increases with the app
Externí odkaz:
http://arxiv.org/abs/2312.16639
The immiscible displacement of a fluid by another one inside a porous medium produces different types of patterns depending on the capillary number Ca and viscosity ratio M. At high Ca, viscous fingers resulting from the viscous instability between f
Externí odkaz:
http://arxiv.org/abs/2312.14799
Autor:
Alzubaidi, Fatimah, McClure, James E., Pedersen, Håkon, Hansen, Alex, Berg, Carl Fredrik, Mostaghimi, Peyman, Armstrong, Ryan T.
The impact of wettability on the co-moving velocity of two-fluid flow in porous media is analyzed herein. The co-moving velocity, developed by Roy et al. (2022), is a novel representation of the flow behavior of two fluids through porous media. Our s
Externí odkaz:
http://arxiv.org/abs/2309.00362
We investigate the behavior of drainage displacements in heterogeneous porous media finding a transition from viscous fingering to foam-like region. A pore network model incorporating the formation of blobs is adopted to study this phenomenon. By imp
Externí odkaz:
http://arxiv.org/abs/2307.13451
We consider the effective rheology of immiscible two-phase flow in porous media with random mixtures of two types of grains with different wetting properties using a dynamic pore network model under steady-state. Two immiscible fluids A and B flow th
Externí odkaz:
http://arxiv.org/abs/2302.14079
Autor:
Pedersen, Håkon, Hansen, Alex
A fundamental variable characterizing immiscible two-phase flow in porous media is the wetting saturation, which is the ratio between the pore volume filled with wetting fluid and the total pore volume. More generally, this variable comes from a spec
Externí odkaz:
http://arxiv.org/abs/2212.07285
We consider immiscible and incompressible two-phase flow in porous media under steady-state conditions using a dynamic pore network model. We focus on the fluctuations in a Representative Elementary Area (REA), with the aim to demonstrate that the st
Externí odkaz:
http://arxiv.org/abs/2209.00030