Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Borgne, Tanguy Le"'
Mixing describes the process by which solutes evolve from an initial heterogeneous state to uniformity under the stirring action of a fluid flow. Fluid stretching forms thin scalar lamellae which coalesce due to molecular diffusion. Owing to the line
Externí odkaz:
http://arxiv.org/abs/2309.14040
Mixing fronts form when fluids with different chemical compositions are brought into contact. They influence a large range of biogeochemical processes in hydrological systems. An important mechanism governing mixing rates in such fronts is stretching
Externí odkaz:
http://arxiv.org/abs/2309.06347
Prediction of reactive transport in porous media remains challenging when pore scale incomplete mixing is at play. Previous experimental studies investigated chemical reactions in porous media by visualizing reaction product or reactants mostly in un
Externí odkaz:
http://arxiv.org/abs/2306.05018
Transport in multiphase flow through porous media plays a central role in many biological, geological, and engineered systems. Here, we use numerical simulations of transport in immiscible two-phase flow to investigate dispersion in multiphase porous
Externí odkaz:
http://arxiv.org/abs/2109.10985
Autor:
Velásquez-Parra, Andrés, Aquino, Tomás, Willmann, Matthias, Méheust, Yves, Borgne, Tanguy Le, Jiménez-Martínez, Joaquín
The simultaneous presence of liquid and gas in porous media increases flow heterogeneity compared to saturated flows. However, so far the impact of saturation on flow statistics and transport dynamics remained unclear. Here, we develop a theoretical
Externí odkaz:
http://arxiv.org/abs/2103.08016
We analyze the dynamics of solute mixing in a vortex flow. The transport of a passive tracer is considered in a Rankine vortex. The action of a shear flow, in general, is to achieve stretching of fluid elements. A vortex flow exhibits stretching and
Externí odkaz:
http://arxiv.org/abs/2002.12792
We investigate tracer transport on random discrete fracture networks that are characterized by the statistics of the fracture geometry and hydraulic conductivity. While it is well known that tracer transport through fractured media can be anomalous a
Externí odkaz:
http://arxiv.org/abs/1704.02762
Publikováno v:
Dentz, M., P. K. Kang, and T. Le Borgne, Adv. Water Resour. 82 (2015), 16-26
This paper derives and analyzes continuous time random walk (CTRW) models in radial flow geometries for the quantification of non-local solute transport induced by heterogeneous flow distributions and by mobile-immobile mass transfer processes. To th
Externí odkaz:
http://arxiv.org/abs/1611.08452
Publikováno v:
Phys. Rev. Fluids 1, 074004 (2016)
We develop a continuous time random walk (CTRW) approach for the evolution of Lagrangian velocities in steady heterogeneous flows based on a stochastic relaxation process for the streamwise particle velocities. This approach describes persistence of
Externí odkaz:
http://arxiv.org/abs/1608.02208
A numerical method to efficiently solve for mixing and reaction of scalars in a two-dimensional flow field at large P\'eclet numbers but otherwise arbitrary Damk\"ohler numbers is reported. We consider a strip of one reactant in a pool of another rea
Externí odkaz:
http://arxiv.org/abs/1605.08696