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Stabilized mixed finite elements for deformable porous media with double porosity
Coupled problem Double porosity Effective stress Mixture theory Stabilized finite elements Twofold saddle point problem
2015/7/1
Natural geomaterials such as fissured rocks and aggregated soils often exhibit a pore size distribution with two dominant pore scales, usually termed macropores and micropores. High-fidelity descripti...
On the effective stress in unsaturated porous continua with double porosity
Constitutive behavior Geological material Granular material Microstructures Porous material
2015/7/1
Using mixture theory we formulate the balance laws for unsaturated porous media composed of a double-porosity solid matrix infiltrated by liquid and gas. In this context, the term ‘double porosity’ pe...
The structural porosity in soil hydraulic functions – a review
soil structure bi-modal soils soil water retention unsaturated conductivity pore size distribution structural pore domain matrix pore domain
2015/2/3
Products of biological processes are the dominant factor of soil structure formation in A horizons, while in B horizons their role is less expressed. Soil structure influences dominantly the structura...
Stochastic particle packing with specified granulometry and porosity
granular media simulation particulate systems particle generation point processess
2012/9/19
This work presents a technique for particle size generation and placement in arbitrary closed domains. Its main application is the simulation of granular media described by disks. Particle size genera...
Porosity and Lithology Prediction in Eve Field, Niger Delta Using Compaction Curves and Rock Physics Models
Compaction Trend Lithology Porosity Reservoir Characteristic
2013/3/7
The primary objective of this study is to investigate the porosity-depth trends of shales and sands and how they affect lithologies. Compaction curves from well logs of five wells were determined usin...
Effect of surfactant on porosity and swelling behaviors of guar gum-g-poly(sodium acrylate-co-styrene)/attapulgite superabsorbent hydrogels
Surfactant Porosity Guar gum Hydrogel Swelling behavior
2011/10/10
Novel fast-swelling porous guar gum-g-poly(sodium acrylate-co-styrene)/attapulgite (GG-g-P(NaA-co-St)/APT) superabsorbent hydrogels were prepared by simultaneous free-radical graft copolymerization re...
Effect of surfactant on porosity and swelling behaviors of guar gum-g-poly(sodium acrylate-co-styrene)/attapulgite superabsorbent hydrogels
Surfactant Porosity Guar gum Hydrogel Swelling behavior
2011/12/14
Novel fast-swelling porous guar gum-g-poly(sodium acrylate-co-styrene)/attapulgite (GG-g-P(NaA-co-St)/APT) superabsorbent hydrogels were prepared by simultaneous free-radical graft copolymerization re...
Porosity of Deep Fat Fried Breaded Chicken Meat
porosity oil absorption deep fat frying chicken meat
2010/3/24
Effects of the addition of rice starch and dietary fibres (pectin and Fibrex) on the porosity of basic frying mixture formulations (corn flour, salt, spices) and oil uptake of coated chicken meat have...
Computer aided determination of porosity in sintered steels
Powder metallurgy Sintering pre-alloyed Astaloy CrL and CrM steels Computer method of porosity analysis
2009/12/3
Purpose: Purpose of this paper was to apply a computer method of open porosity analysis for determination of porosity in sintered Astaloy CrL and CrM powders.
Design/methodology/approach: The powders...
淀粉基多孔高吸水树脂致孔剂对吸液速率影响（Effect of Porosity Generators on Absorbency Rate Starch-based Superabsorbent）
高吸水树脂 致孔剂 吸液速率
2009/11/3
研究了淀粉基多孔高吸水树脂的合成及其吸液性质，比较了不同致孔剂如丙酮、碳酸氢钠、蔗糖对树脂吸液速率的影响。结果表明，添加致孔剂能有效提高树脂的吸液速率，碳酸氢钠具有较好的致孔效果。扫描电镜分析证明，合成的高吸水树脂具有疏松的多孔结构，它是提高高吸水树脂吸液速率的主要原因。
Representative elementary area for multifractal analysis of soil porosity using entropy dimension
Representative elementary area multifractal analysis soil porosity entropy dimension
2009/11/3
The notion of representative elementary area (REA) developed to address heterogeneity and scale problems in quantitative soil pedology comes from the notion of representative elementary volume of flui...
Use of SEM and EDS analysis in the investigation of Al-Si-Cu piston alloy cast porosity
casting porosity piston
2009/10/23
Porosity formation was detected in the casting thinnest section in the proximity of the as cast surface and near the wall centerline. In order to investigate the cause of the porosity formation light ...
Effects of Porosity on the Free Convection Flow of Non-Newtonian Fluids Along a Vertical Plate Embedded in a Porous Medium
Non-Newtonian flow natural convection porous medium
2009/10/15
In recent years, great interest has been shown in porous media. The applications of porous media ingeophysics, petroleum processes, and air conditioning are well established. Many studies of porous me...
Evaluation of Soil Porosity Using a Low MHz Range Dielectric Constant
Dielectric constant Soil Porosity MHz frequency Liquefaction
2009/10/12
Researchers have attempted to determine the dielectric constants of soil-water mixtures in order to establish relationships between dielectric constant and soil properties such as porosity. However, t...
Production and Characterization of High Porosity Ti-6Al-4V Foam by Space Holder Technique in Powder Metallurgy
Foam Carbamide Porosity Ti6Al4V alloy Space holder Compression testing
2009/10/9
The present study was undertaken to investigate the production of a high porosity, biocompatible Ti-6Al- 4V alloy by space holder technique using spherical carbamide particles, and to characterize the...