The flow of yield stress fluids in porous media is interestingly complex due to the interplay between the medium's heterogeneity and non-linear rheology. For instance, a non-linear Darcy law emerges as the number of flowing paths increases with the applied pressure difference.
In this talk, we will discuss some of the statistical aspects of this problem. In particular, we will explore how the...
The flow of viscoelastic fluids such as polymeric solutions in porous media has a wide range of applications, spanning from green energy transition to biofluids and groundwater remediation. Such flows can give rise to viscoelastic turbulence in porous media, even at very small Reynolds numbers. Depending on the application, this chaotic behavior can be considered either an advantage, enhancing...
Fluids involved in industrial, geological and biological media are often characterized by non-Newtonian rheologies. Examples are blood flow in microvascular networks, and the flow of polymer solutions or slurries in enhanced oil recovery, groundwater remediation and geothermal energy production. Spatial heterogeneity in the physical medium properties lead to scale effects in the flow and...
J.D. Torrenegra-Rico,1 H. Auradou,2 and M. Chabanon1
1)Université Paris-Saclay, CNRS, CentraleSupélec, Laboratoire EM2C, 91190, Gif-sur-Yvette,
France.
2)Université Paris-Saclay, CNRS, FAST, 91405, Orsay, France.
(*Electronic mail: juan-david.torrenegra-rico@centralesupelec.fr)
Active fluids are known to sustain fluid flows in time without any external forcing. In porous media, active...
We have developed a comprehensive numerical model for the transport and drying of solutions in thin porous media that consist of permeable fibers such as paper. We explicitly account for the gas-phase transport dynamics. Moreover, we introduce an empirical relation for the concentration- and molecular-weight dependence of the pore-fiber transport rate of the solutes. These two key elements...
Fibrous textiles constitute a class of porous media in which moisture transport is strongly affected by finite-size effects and by non-linear couplings between fluid state, pore structure and material swelling. During wetting and drying processes such as washing, drying or perspiration transport, the dynamics cannot be described solely in terms of capillary flow in the pore space.
In...
Primer inks in which a divalent salt is the main active ingredient play a critical role in inkjet printing by governing the penetration, lateral spreading, and interaction of subsequently deposited color inks with the coated paper substrate. These mechanisms directly influence image sharpness, color fidelity, and drying behavior, thus overall print quality [1]. However, interpreting...
Anomalous solute transport within porous media, characterized by early breakthrough and extended tailing in breakthrough curves, presents significant challenges for subsurface modeling. While existing models often emphasize geometrical and hydrodynamic factors, they tend to overlook non-Fickian diffusion mechanisms and viscosity effects during miscible displacement. This investigation explores...
