The effect of a "pore-size" length-scale parameter 1 on compaction of grounds with fluid inclusions is studied. They are modelled as continua endowed with micro-structure by means of the macro-modelling procedure proposed in [2]. We show the dependence of field evolution equations on the micro-structure parameter l and compare our model with the homogenized asymptotic ones. The consideration of...

We investigate the uid dynamics in two-dimensional micromodels that represent natural complex porous media using micro-Particle Image Velocimetry (micro-PIV). The pore-scale velocity distributions are measured for single-phase ow and are in very good agreement with direct numerical simulations. Our validated and optimized Micro-PIV system is then used to investigate immiscible two-phase ow prop...

With significant increase of tomographic equipment power, demand for Prediction relative permeability prediction Predicting in porous media from digital image data. In this work, it is predicted three -phase relative permeabilities with co-applying Darcy’s and Stokes equations in two case studies, namely Bentheimer sandstone and Estaillades limestone which their micro-CT data files were downloa...

the characterizations of natural diatomite from birjand deposit (iran) were studied such as chemical compositions, specific surface area, total pore volume, pore size distribution and xrd. the diatomite that was treated only with sulfuric acid displayed a larger surface area, expanded total pore volume and increased pore size in comparison with both washed natural diatomite with deionized water...

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 ...

Porous solids have an important role in addressing some of the major energy-related problems facing society. Here we describe a porous solid, α-MnO2, with a hierarchical tetramodal pore size distribution spanning the micro-, meso- and macro pore range, centred at 0.48, 4.0, 18 and 70  nm. The hierarchical tetramodal structure is generated by the presence of potassium ions in the precursor solut...

Three-dimensional (3D) microprinting is a computerized fabrication technique that can produce porous objects with highly complicated pore micro-architecture using data generated by computer aided design (CAD) or other imaging modalities [1]. This technique has been used for fabrication of porous biodegradable polymeric scaffolds that are intended, by design, to have reproducible and well-define...

A uniformly distributed array of micro test tubes and microbeakers is formed on a p-type silicon substrate with tunable cross-section and distance of separation by anodic etching of the silicon wafer in N, N-dimethylformamide and hydrofluoric acid, which essentially leads to the formation of macroporous silicon templates. A reasonable control over the dimensions of the structures could be achie...

The Cretaceous Sanagasta neosauropod nesting site (La Rioja, Argentina) was the first confirmed instance of extinct dinosaurs using geothermal-generated heat to incubate their eggs. The nesting strategy and hydrothermal activities at this site led to the conclusion that the surprisingly 7 mm thick-shelled eggs were adapted to harsh hydrothermal microenvironments. We used micro-CT scans in this ...

The size and distribution of wood pores greatly influence its properties like density, thermal conductivity and permeability as well as acoustical property. Different techniques were developed to measure wood pore characteristic parameters. In this paper, mercury intrusion porosimetry (MIP) and X-ray Micro-computed tomography (μCT) were used to characterize pore characteristics of Populus L. wo...