Flow Through Porous Media
Mostrando 25-35 de 35 artigos, teses e dissertações.
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25. MODELO ESTOCÁSTICO PARA A EXCLUSÃO PELO TAMANHO DURANTE O TRANSPORTE DE SUSPENSÕES PARTICULADAS EM MEIOS POROSOS / STOCHASTIC MODEL FOR SIZE EXCLUSION MECHANISM DURING SUSPENDED PARTICLE SUSPENSION TRANSPORT IN POROUS MEDIUM
Deep bed filtration of water with particles occurs in several industrial and environmental processes like water filtration and soil contamination. In petroleum industry, deep bed filtration occurs near to injection wells during water injection, causing injectivity reduction. It also takes place during well drilling, sand production control, produced water di
Publicado em: 2005
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26. MECANISMOS QUE GOVERNAM A EFETIVIDADE DE AGENTES OBTURANTES NO CONTROLE DA INVASÃO DE FLUIDOS DE PERFURAÇÃO NA ROCHA RESERVATÓRIO DE PETRÓLEO / THE DRIVING MECHANISMS FOR BRIDGING AGENTS EFFECTIVENESS ON DRILLING FLUIDS INVASION CONTROL INTO OIL RESERVOIR ROCKS
Este estudo procurou observar e quantificar os parâmetros operacionais que governam as propriedades permoporosas da torta de filtração, formada após o escoamento de uma solução de glicerina com uma determinada concentração de sólidos. A formação de um reboco externo de baixa permeabilidade é um dos fatores mais importantes para minimizar da invas
Publicado em: 2005
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27. Modeling solute transport through unsaturated porous media using homogenization I
In this paper we consider homogenization of the diffusion, adsorption and convection of chemical species in porous media, that are transported by unsaturated single phase flows. The unsaturated flow is described by the Richards' equation. We present in details a rigorous derivation of the corresponding dual porosity model. Then we give the derivation by homo
Computational & Applied Mathematics. Publicado em: 2004-12
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28. Influencia da vibração na permeabilidade absoluta de meios porosos saturados com agua / Influence of the vibration on the absolute permeability of porous media satured with water
This work verifies experimentally the effects of the mechanical vibration on the absolute permeability of saturated porous media upon which a uniform flow is simultaneously imposed. After finding a driving range within which indirect effects of the vibration are excluded, such as those resulting from ultrasonic heating and mechanical disintegration of the ro
Publicado em: 2004
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29. NUMERICAL ANALYSIS OF THERMO-HYDRAULIC PROBLEMS IN POROUS MEDIA / ANÁLISE NUMÉRICA DE PROBLEMAS TERMO-HIDRÁULICOS EM MEIOS POROSOS
The dissertation presents a study of the resolution of thermo-hydraulic coupling problems, through the use of numerical techniques. The study has the objective the implementations validation of the temperature gradients effects in the moisture flux. For this, the program UNSATCHEM-2D is used to simulate the flow of water in mediums of variable saturation to
Publicado em: 2003
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30. Flows of Bingham Materials Through Ideal Porous Media: an Experimental and Theoretical Study
The flow of Bingham liquids through porous media has been studied. Experiments have been performed to determine the flow rate / pressure drop relationship for the flow of a grease of Binghamian rheological behavior through an array of rods of circular cross section. The yield stress and plastic viscosity of the grease have been determined with the aid of a c
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2002-03
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31. GEOMECHANICAL EFFECTS ON PETROLEUM RESERVOIR SIMULATIONS / EFEITOS GEOMECÂNICOS NA SIMULAÇÃO DE RESERVATÓRIOS DE PETRÓLEO
Numerical simulators for reservoir flow analysis are important tools for the optimization of oil field development. These simulators model the multiphase flow through compressible porous medium taking into account the phase equilibrium equations, flow laws and the rock volumetric change associated to the pore pressure change during production. Some simulator
Publicado em: 2002
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32. Influence of the Gas-Water Interface on Transport of Microorganisms through Unsaturated Porous Media
In this article, a new mechanism influencing the transport of microorganisms through unsaturated porous media is examined, and a new method for directly visualizing bacterial behavior within a porous medium under controlled chemical and flow conditions is introduced. Resting cells of hydrophilic and relatively hydrophobic bacterial strains isolated from grou
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33. Effects of Motility and Adsorption Rate Coefficient on Transport of Bacteria through Saturated Porous Media
Three strains of Pseudomonas fluorescens with different motility rates and adsorption rate coefficients were injected into porous-medium reactors packed with l-mm-diameter glass spheres. Cell breakthrough, time to peak concentration, tailing, and cell recovery were measured at three interstitial pore velocities (higher than, lower than, and much lower than t
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34. Noninvasive Quantitative Measurement of Bacterial Growth in Porous Media under Unsaturated-Flow Conditions†
Glucose-dependent growth of the luxCDABE reporter bacterium Pseudomonas fluorescens HK44 was monitored noninvasively in quartz sand under unsaturated-flow conditions within a 45- by 56- by 1-cm two-dimensional light transmission chamber. The spatial and temporal development of growth were mapped daily over 7 days by quantifying salicylate-induced bioluminesc
American Society for Microbiology.
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35. The transport of LDL across the deformable arterial wall: the effect of endothelial cell turnover and intimal deformation under hypertension
A multilayered model of the aortic wall is introduced to investigate the transport of low-density lipoprotein (LDL) under hypertension, taking into account the influences of increased endothelial cell turnover and deformation of the intima at higher pressure. Meanwhile, the thickness and properties of the endothelium, intima, internal elastic lamina (IEL), a
American Physiological Society.