Listar Grupo de Métodos Numéricos na Enxeñería por data de publicación
Mostrando ítems 21-40 de 133
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Meshless methods for potential problems in electrical engineering applications
(Elsevier, 1999)[Abstract] In some problems in engineering applications, the mesh generation process represents one of the big challenges when numerical methods such as finite elements, finite differences or boundary elements are applied. ... -
Una formulación numérica para el análisis de redes de tierra de instalaciones eléctricas incorporando modelos de terreno multicapa
(Sociedad Española de Métodos Numéricos en Ingeniería, 1999)[Resumen] El correcto diseño de la red de tierras de una gran instalación eléctrica es esencial para garantizar tanto la seguridad de las personas como la protección de los equipos. Para ello se requiere la determinación ... -
A boundary element formulation for the substation grounding design
(Elsevier, 1999)[Abstract] A Boundary Element approach for the numerical computation of substation grounding systems is presented. In this general formulation, several widespread intuitive methods (such as Average Potential Method) can ... -
Resolución numérica de problemas de potencial en aplicaciones de ingeniería mediante métodos sin malla
(Sociedad Española de Métodos Numéricos en Ingeniería, 1999)[Resumen] El proceso de discretización del dominio y la consiguiente generación de una malla de elementos es el punto de partida, pero también una de las mayores dificultades, de la aplicación de los métodos de elementos ... -
Aplicación de una formulación numérica de elementos finitos para el estudio de problemas de transporte convectivo en zonas portuarias
(Sociedad Española de Métodos Numéricos en Ingeniería, 1999)[Resumen] La ecuación diferencial del trasporte por convección-difusión permite modelizar un gran número de procesos de interés en la ingeniería. Así, fenómenos com el estudio de la distribución de temperaturas en una pieza ... -
Desarrollo de una formulación numérica basada en el MEF para la estabilización de problemas de transporte por convección-difusión
(Sociedad Española de Métodos Numéricos en Ingeniería, 1999)[Resumen] La modelización de problemas en mecánica de fluidos cuando la velocidad del fluido es elevada resulta complicada debido a la aparición de inestabilidades en la solución numérica al emplear esquemas convencionales ... -
Una formulación en elementos finitos para la resolución del flujo viscoso incompresible no permanente
(Sociedad Española de Métodos Numéricos en Ingeniería, 1999)[Resumen] Se expone en este trabajo el resultado de la elaboración de un código, que basado en el método de los elementos finitos, resuelve la ecuación de Navier–Stokes en un dominio bidimensional, para condiciones iniciales ... -
A 2D numerical model for the transport of pollutants. The influence of Boundary Conditions
(Utah State University Extension, 1999)[Abstract] The pollutants transport phenomena in a 2D unsteady free surface flow has been studied. The weighted residual method has been used for the integration of the transport equations, appying the Galerkin formulation ... -
Finite element solution of the Navier-Stokes equations using a SUPG formulation
(Universidad de Zaragoza, 1999) -
A generalized statement for advective-diffusive phenomena. Finite element model and applications
(John Wiley and Sons, 2000)[Abstract] Solving convective-diffusive transport problems is a frequent task in engineering, especially in convection dominated situations. Moreover, the standard statement for the transport problem leads to the result ... -
Galerkin, Least-Squares and GLS numerical approaches for advective-diffussive transport problems in engineering
(The International Center of Numerical Methods in Engineering, 2000)[Abstract] In this paper, a study of three FE numerical formulations (Galerkin, Least Squares and Galerkin/Least Squares) applied to the convective-diffuse problem is presented, focusing our attention in high Péclet-number ... -
Computing stabilization parameters in numerical models for advective-diffusive transport problems
(Universidade de Aveiro, 2000)[Abstract] Numerical modelling in Fluid Mechanics is particulary difficult in high-advective fluid problems. The Finite Element Method, which has been sucessfully applied to very challenging problems in Computational ... -
An enriched meshless numerical approach for potential theory problems
(The International Center of Numerical Methods in Engineering, 2000)[Abstract] One of the meshless thechniques that have been recently proposed for solving Boundary Value Problems is the so-called Weighted Least Square (WLS) Method with a Point Collocation approach. Meshless methods were ... -
Parallel computing aided design of earthing systems for electrical substations in non homogeneous soil models
(IEEE Computer Society, 2000)[Abstract] An accurate design of grounding systems is essential to assure the safety of the persons, to protect the equipment and to avoid interruptions in the power supply. In order to attain these targets, the equivalent ... -
A general numerical model for grounding analysis in layered soils
(Civil-Comp, 2000)[Abstract] The safety of the persons, the protection of the equipment and the continuity of the power supply are the main objectives of the grounding system of a large electrical installation. For its accurate design, it ... -
Enrichment of weighted least-squares approaches for potential problems in engineering applications
(Universidade de Aveiro, 2000)[Abstract] In this paper, we review one of the meshless methods proposed in last years for solving boundary value problems based on a weighed least square methods. Furthermore, we analyze the use of enrichment techniques ... -
Finite element solution of the Navier-Stokes equation using a SUPG formulation
(Tech Science, 2000) -
On the resolution of the viscous incompressible flow for various SUPG finite element formulations
(The International Center of Numerical Methods in Engineering, 2000)[Abstract] A Finite Element based program has been released to solve the steady 2D Navier- Stokes equations. The mixed-variable algorithm is used as a first approach to solve the differential problem. In order to reduce ... -
Numerical modelling for grounding grids in high-performance parallel computers
(WIT, 2000)[Abstract] The design of safe grounding systems in electrical installations is essential to assure the security of the persons, the protection of the equipment and the continuity of the power supply [1,2]. In order to ... -
High Order Shape Design Sensitivity: A Unified Approach
(Elsevier, 2000)[Abstract] Three basic analytical approaches have been proposed for the calculation of sen- sitivity derivatives in shape optimization problems. The first approach is based on differentiation of the discretized equations ...