In a virtual sculpting environment, we manipulate objects as a set of volume elements (voxels). In order to start the sculpture process from a polygonal object, we have to discretize this object as a set of voxels. This step is called voxelization. Several voxelization methods have already been proposed, but none matches all of our criteria. In this paper, we propose a practical approach that h...

In this study, a grain-scale modelling technique has been developed to generate the capillary pressure-saturation curves for swelling granular materials. This model employs only basic granular properties such as particles size distribution, porosity, and the amount of absorbed water for swelling materials. Using this model, both drainage and imbibition curves are directly obtained by pore-scale...

We describe the ongoing development of lattice-Boltzmann (LB) computer simulation codes to study flow in porous media at the pore scale. LB simulations have evolved over the past decade and are now used as a tool to calculate both singleand multi-phase flow properties directly at the pore scale using X-ray Micro Tomography (XMT) pore space images. We will review the development of our codes to ...

We combine high-resolution isotherms measurements and light scattering technics to study over a broad temperature range collective effects during the condensation and evaporation of helium from Vycor, a prototypic disordered porous material. For evaporation, our results provide the first direct evidence for a crossover from a percolation collective mechanism at low temperature to a local cavita...

Phenomena occurring in soil pores can best be studied if the geometry of the pore space is understood. A number of models for the pore space have been proposed. These have included a Boolean grain process, fractals, packed sphere and other grain models, bubble processes, cracking processes and a range of models based on simple geometrical objects. This paper considers the issues raised by these...

Pore-scale network modeling can predict multiphase flow properties with arbitrary wetting conditions if the network represents the geology of the sample accurately. Such pore-scale modeling uses topologically disordered networks that realistically represent the pore structure. To generate the network it is first necessary to have a three-dimensional voxel-based pore-space representation that is...