Permeability Numerical Calculations
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. A new algorithm, of course parallelization, for the calculation of equivalent permeabilities in reservoirs / Um novo algoritmo, naturalmente paralelizável, para o cálculo de permeabilidades equivalentes em reservatórios
A new numerical method is proposed for the permeabilities upscaling take into consideration periodic boundary conditions. This method combines domain decomposition with mixed finite elements in discretization of the local problem of pressure-velocity necessary to meet the equivalent permeabilities.
Publicado em: 2008
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2. Analise numerico/experimental da formação de microporosidades durante a solidificação de ligas de aluminio
Microporosity formed during solidification in casting is one of the major problems which deteriorates the quality of the cast products. Many studies have been reported about this kind of defect. This study presents a numerical and experimental analysis of interdendritic rnicroporosity formation during solidification of metallic alloys. A numerical model was
Publicado em: 1996
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3. The "independence principle" in the processes of water transport.
The processes of membrane transport exhibiting permeability coefficients depending on the species activities do not obey the "independence principle" and are assumed to take place by a mechanism of discrete nature, analyzable by a kinetic formalism. In this article, we study the dependence of the osmotic permeability coefficient on the water activities, from
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4. Quantitative Analysis of Mass and Energy Balance in Non-Ideal Models of the Renal Counterflow System*
A modified Newton-Raphson method for solving finite difference equations for the renal counterflow system is described. The method has proved generally stable and efficient, and has given significant computational results for a variety of models: calculations on single solute models of the coupled vasa recta nephron counterflow system have shown that for lar
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5. Estimation of Rapidly Exchangeable Cellular Thyroxine from the Plasma Disappearance Curves of Simultaneously Administered Thyroxine-131I and Albumin-125I*
A mathematical analysis of the plasma disappearance curves of simultaneously injected thyroxine-131I and albumin-125I allows the development of simple formulas for estimating the pool size and transfer kinetics of rapidly exchangeable intracellular thyroxine in man. Evidence is presented that the early distribution kinetics of albumin-125I can be used to rep