Semi Implicit Numerical Schemes
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Comparison of an impec and a semi-implicit formulation for compositional reservoir simulation
In compositional reservoir simulation, a set of non-linear partial differential equations must be solved. In this work, two numerical formulations are compared. The first formulation is based on an implicit pressure and explicit composition (IMPEC) procedure, and the second formulation uses an implicit pressure and implicit saturation (IMPSAT). The main goal
Braz. J. Chem. Eng.. Publicado em: 2014-12
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2. Numerical solution of the Falkner-Skan equation using third-order and high-order-compact finite difference schemes
We present a computational study of the solution of the Falkner-Skan equation (a thirdorder boundary value problem arising in boundary-layer theory) using high-order and high-order-compact finite differences schemes. There are a number of previously reported solution approaches that adopt a reduced-order system of equations, and numerical methods such as: sh
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-12
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3. Mimetic finite difference methods in image processing
We introduce the use of mimetic methods to the imaging community, for the solution of the initial-value problems ubiquitous in the machine vision and image processing and analysis fields. PDE-based image processing and analysis techniques comprise a host of applications such as noise removal and restoration, deblurring and enhancement, segmentation, edge det
Computational & Applied Mathematics. Publicado em: 2011
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4. Simulação numérica do escoamento bifásico em meios porosos heterogêneos empregando uma formulação semi-implícita, imitadores de fluxo e o método dos volumes finitos / Numerical simulation of two-phase flow in heterogeneous porous media applying a semi-implicit formulation, flux limiter and finite volume method
A new numerical method is proposed for the solution of two-phase flow problem in petroleum reservoirs. The two-phase (water and oil) flow problem is governed by a pressure-velocity equation coupled to a saturation equation. For computational eficiency an operator spliting technique is used; distinct time steps can be used for the computation of transport and
Publicado em: 2009
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5. Modelo computacional paralelo para a hidrodinâmica e para o transporte de substâncias bidimensional e tridimensional / Parallel computational model for hydrodynamics and for the scalar two-dimensional and three-dimensional transport of substances
Neste trabalho desenvolveu-se e implementou-se um modelo computacional paralelo multifísica para a simulação do transporte de substâncias e do escoamento hidrodinâmico, bidimensional (2D) e tridimensional (3D), em corpos de água. Sua motivação está centrada no fato de que as margens e zonas costeiras de rios, lagos, estuários, mares e oceanos são
Publicado em: 2007
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6. Esquemas de alta resolução para controle da dispersão numerica em simulação de reservatorios
Standard finite-diference reservoir simulation normally uses single-point upstream welghting to approximate the components of the convective flow term at the interfaces between blocks. This procedure stabilizes the numerical solution, but introduces high levels of numerical dispersion, difficulting the correct interpretation of the simulated results. Exponen
Publicado em: 1991