We introduce a novel method to produce macroporous ceramics by capillary suspensions. Adding a small amount (~1 vol%) of an immiscible secondary phase to a low concentration (~20 vol%) suspension can increase the yield stress by several orders of magnitude. This drastic change in flow behavior is induced by the creation of a sample-spanning particle network in the suspension controlled by capil...

A diverse range of multiphase flow and transport occurs in multiscale porous media. The micro-continuum Darcy–Brinkmann–Stokes (DBS) model has been developed to simulate the at both pore continuum scales via single-field equations. However, unacceptable spurious velocities produced by conventional DBS present challenges modeling capillary-dominated dynamics. This study improves mitigate these g...

Drying of capillary porous media initially saturated with saline water is central to many engineering and environmental applications. In order predict the evolution solute concentration in a medium, macroscopic continuum models (CMs) are commonly employed. However, predictive aptitudes CMs have been questioned. this work, we solve classical advection-diffusion equation for transport an isotherm...

Stochastic models that account for a wide range of pore-scale e€ects are discussed in the context of two-phase, immiscible displacement problems in natural porous media. We focus on migration of dense, nonaqueous phase liquids (DNAPLs) through watersaturated geological materials. DNAPL movement is governed by buoyancy, capillary, and viscous forces, as well as by the details of the porous mediu...

The present method of capillary effects inclusion in modelling of flow in porous and fractured media and the recent improvements are critically reviewed. The way of capillary pressure inclusion, based on volume averaging method, completed by some new formulae, is presented. A set of new equations and their benefits as compared with standard and improved models are discussed.

We propose and analyze a model for sharp fronts in porous media, aiming at an investigation of the capillary pressure. Using the notion of microlocal patterns we analyze the local behavior of the system. Depending on the structure of the local patterns we can derive upscaled equations that characterize the capillary pressure and include the hysteresis effect that is known from the physical system.

by Giuliano Maurizio Laudone Environmentally friendly technology: The behaviour of natural and synthetic binder systems within paper coatings. Coating shrinkage upon drying is a phenomenon well known to the paper coating industJy, where it often causes changes in the final structure of the coating layer leading to poor results in terms of gloss, light scattering, surface strength, coverage, uni...

In this paper, we propose a procedure combining Lattice-Boltzmann and finite element simulations to model the effects of capillary pressure in porous microstructures. Starting from an explicit geometry microstructure, method is used simulate condensation vapor phase liquid predict films phases for arbitrary solid skeleton. Then, provided prescribe surface tension due phases. The skeleton can de...

In porous media, pore geometry and wettability are determinant factors for capillary flow in drainage or imbibition. Pores are often considered as cylindrical tubes in analytical or computational studies. Such simplification prevents the capture of phenomena occurring in pore corners. Considering the corners of pores is crucial to realistically study capillary flow and to accurately estimate li...

controlled by capillarity, any attempt to predict DNAPL behavior in a porous medium requires determination of Dense nonaqueous phase liquids (DNAPLs) are important subsurthe capillary pressure–saturation relationship, hereafter face contaminants. Information is lacking on DNAPL behavior in heterogeneous porous media such as weathered rock (saprolite). We denoted by w(hc), where w is the volumet...