Listar GI-GMNE - Artigos por autor "Casteleiro, Manuel"
Mostrando ítems 1-16 de 16
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A boundary element formulation for the substation grounding design
Colominas, Ignasi; Navarrina, Fermín; Casteleiro, Manuel (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 ... -
A boundary element numerical approach for earthing grid computation
Colominas, Ignasi; Navarrina, Fermín; Casteleiro, Manuel (Elsevier, 1999)[Abstract] Analysis and design of substation earthing involves computing the equivalent resistance of grounding systems, as well as distribution of potentials on the earth surface due to fault currents [1,2]. While very ... -
A general numerical model for grounding analysis in layered soils
Colominas, Ignasi; Gómez Calviño, Javier; Navarrina, Fermín; Casteleiro, Manuel (Elsevier, 2002)[Abstract] Safety of persons, protection and equipment and continuity of power supply are the main objectives of the grounding system of a large electrical installation. For its accurate design, it is essential to determine ... -
A generalized statement for advective-diffusive phenomena. Finite element model and applications
Gómez, Héctor; Colominas, Ignasi; Navarrina, Fermín; Casteleiro, Manuel (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 ... -
A numerical formulation for grounding analysis in stratified soils
Colominas, Ignasi; Navarrina, Fermín; Casteleiro, Manuel (IEEE Power Engineering Society, 2002)[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. In order to achieve ... -
Analysis of transferred earth potentials in grounding systems: a BEM numerical approach
Colominas, Ignasi; Navarrina, Fermín; Casteleiro, Manuel (IEEE Power Engineering Society, 2003)[Abstract] In this work we present a numerical formulation for the analysis of a common problem in electrical engineering practice, that is, the existence of transferred earth potentials in a grounding installation [1]. ... -
Boundary element formulation for the analysis of transferred potentials in electrical installations
Colominas, Ignasi; Navarrina, Fermín; Casteleiro, Manuel (Elsevier, 2004)[Abstract] In this work we present a BEM numerical formulation for the analysis of a common problem in electrical engineering practice, that is, the existence of transferred earth potentials in a grounding installation ... -
Computer analysis of earthing systems in horizontally or vertically layered soils
Colominas, Ignasi; Gómez Calviño, Javier; Navarrina, Fermín; Casteleiro, Manuel (Elsevier, 2001)[Abstract] The main objectives of grounding systems are to guarantee the personal safety, the equipment protection and the continuity of the power supply. To attain these goals, the potential distribution on the earth ... -
Finite volume solvers and moving least-squares approximations for the compressible Navier-Stokes equations on unstructured grids
Cueto-Felgueroso Landeira, Luis; Colominas, Ignasi; Navarrina, Fermín; Casteleiro, Manuel (Elsevier, 2005)[Abstract] This paper introduces the use of Moving Least-Squares (MLS) approximations for the development of high order upwind schemes on unstructured grids, applied to the numerical solution of the compressible Navier-Stokes ... -
Una formulación numérica general para el cálculo y diseño de tomas de tierra en grandes instalaciones eléctricas
Colominas, Ignasi; Navarrina, Fermín; Casteleiro, Manuel (Universitat Politècnica de Catalunya, 1997)[Resumen] La puesta a tierra de una instalación eléctrica es imprescindible para garantizar su seguridad cuando tienen lugar situaciones de fallo. Para su correcto análisis y diseño se requiere la determinación de una ... -
Una formulación numérica sin malla basada en los métodos SPH con ponderación de Galerkin
Cueto-Felgueroso Landeira, Luis; Colominas, Ignasi; Mosqueira Martínez, Gonzalo; Navarrina, Fermín; Casteleiro, Manuel (Universitat Politècnica de Catalunya, 2005)[Resumen] En este artículo se propone una formulación numérica sin malla de tipo Galerkin basada en el método de partículas SPH con aproximación de mínimos cuadrados móviles y su aplicación a problemas de mecánica de fluidos ... -
High order finite volume schemes on unstructured grids using Moving Least Squares reconstruction. Application to shallow water dynamics
Cueto-Felgueroso Landeira, Luis; Colominas, Ignasi; Navarrina, Fermín; Casteleiro, Manuel (John Wiley and Sons, 2005)[Abstract] This paper introduces the use of Moving Least Squares (MLS) approximations for the development of high-order finite volume discretizations on unstructured grids. The field variables and their succesive derivatives ... -
High Order Shape Design Sensitivity: A Unified Approach
Navarrina, Fermín; López Fontán, Santiago; Colominas, Ignasi; Bendito Pérez, Enrique; Casteleiro, Manuel (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 ... -
On the Galerkin formulation of the smoothed particle hydrodynamics method
Cueto-Felgueroso Landeira, Luis; Colominas, Ignasi; Mosqueira Martínez, Gonzalo; Navarrina, Fermín; Casteleiro, Manuel (John Wiley and Sons, 2004)[Abstract] In this paper, we propose a Galerkin-based smoothed particle hydrodynamics (SPH) formulation with moving least-squares meshless approximation, applied to free surface flows. The Galerkin scheme provides a clear ... -
Topology optimization of structures: a minimum weight approach with stress constraints
Navarrina, Fermín; Muíños Pantín, Iago; Colominas, Ignasi; Casteleiro, Manuel (Elsevier, 2004)Sizing and shape structural optimization problems are normally stated in terms of a minimum weight approach with constraints that limit the maximum allowable stresses and displacements. However, topology structural ... -
Why do computer methods for grounding analysis produce anomalous results?
Navarrina, Fermín; Colominas, Ignasi; Casteleiro, Manuel (IEEE Power Engineering Society, 2003)[Abstract] Grounding systems are designed to guarantee personal security, protection of equipments and continuity of power supply. Hence, engineers must compute the equivalent resistance of the system and the potential ...