Listar por autor "Colominas, Ignasi"
Mostrando ítems 1-20 de 106
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A BEM approach for grounding grid computation
Colominas, Ignasi; Navarrina, Fermín; Casteleiro, Manuel (Computational Mechanics Publications, 1994)[Abstract] Grounding systems are designed to preserve human safety and grant the integrity of equipments under fault conditions. To achieve these goals, the equivalent electrical resistance of the system must be low ... -
A BEM formulation for computational design of grounding systems in stratified soils
Colominas, Ignasi; Aneiros Blanco, Juan M.; Navarrina, Fermín; Casteleiro, Manuel (Centro Internacional de Métodos Numéricos en Ingeniería, 1998)[Abstract] Substation grounding design involves computing the equivalent resistance of the earthing system -for reasons of equipment protection-, as well as distribution of potentials on the earth surface -for reasons of ... -
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 boundary element numerical approach for substation grounding in a two layer earth structure
Colominas, Ignasi; Aneiros Blanco, Juan M.; Navarrina, Fermín (Tech Science Press, 1997)[Abstract] Analysis and design of substation grounding requires computing the distribution of potential on the earth surface (for reasons of human security) and the equivalent resistance of the earthing system (for reasons ... -
A computer aided design system for the analysis of transferred potentials in earthing systems
Colominas, Ignasi; Mosqueira Martínez, Gonzalo; Gómez Calviño, Javier; Navarrina, Fermín; Casteleiro, Manuel (2002)[Abstract] In this work we present a CAD system based on this BEM numerical formulation for the analysis of a common problem in electrical engineering practice, that is, the existence of transferred potentials in a ... -
A general formulation based on the boundary element method for the analysis of grounded instalations in layered soils
Colominas, Ignasi; Navarrina, Fermín; Aneiros Blanco, Juan M.; Casteleiro, Manuel (Computational Mechanics Publications, 1998)[Abstract] The design of safe grounding systems requires computing the potential level distribution on the earth surface for reasons of human security, as well as the equivalent resistance of the earthing installation ... -
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 general numerical model for grounding analysis in layered soils
Colominas, Ignasi; Gómez Calviño, Javier; Navarrina, Fermín; Casteleiro, Manuel (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 ... -
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 Higher‑Order Chimera Method for Finite Volume Schemes
Ramírez, Luis; Nogueira, Xesús; Ouro, Pablo; Navarrina, Fermín; Khelladi, Sofiane; Colominas, Ignasi (Springer, 2018)[Abstract:] In this work a higher-order accurate finite volume method for the resolution of the Euler/Navier–Stokes equations using Chimera grid techniques is presented. The formulation is based on the use of Moving Least ... -
A massively parallel BEM numerical model for grounding analysis in layered soils
Colominas, Ignasi; Gómez Calviño, Javier; Navarrina, Fermín; Casteleiro, Manuel (Fundacja Zdrowia Publicznego "Vesalius", 2001)[Abstract] In the last years the authors have developed a numerical formulation based on the Boundary Element Method for the analysis of grounding systems embedded in uniform soils. This approach has been implemented in a ... -
A meshless numerical approach for the analysis of earthing systems in electrical installations
Colominas, Ignasi; Mosqueira Martínez, Gonzalo; Chao López, Mar; Navarrina, Fermín; Casteleiro, Manuel (Technische Universität München, 1999)[Abstract] In the last three decades some numerical formulations have been developed for solving potential problems in electrical engineering applications. In the particular case of the grounding analysis area, in recent ... -
A meshless numerical formulation for the solution of potential problems in engineering applications
Colominas, Ignasi; Chao López, Mar; Navarrina, Fermín; Casteleiro, Manuel (Tech Science Press, 1998) -
A minimum weight FEM formulation for Structural Topological Optimization with local stress constraints
París, José; Muíños Pantín, Iago; Navarrina, Fermín; Colominas, Ignasi; Casteleiro, Manuel (2005)Since Bendsoe and Kikuchi proposed the basic concepts in 1988, most of topology structural optimization results have been obtained so far by means of a maximum stiffness (minimum strain energy, minimum compliance) approach. ... -
A minimum weight with stress constraints FEM approach for topology structural optimization problems
Muíños Pantín, Iago; Colominas, Ignasi; Navarrina, Fermín; Casteleiro, Manuel (2002)[Abstract] 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 ... -
A new Mean Preserving Moving Least Squares method for Arbitrary Order Finite Volume schemes
Ramírez, Luis; Edreira Marzoa, Laura; Couceiro, Iván; Ouro, Pablo; Nogueira, Xesús; Colominas, Ignasi (Elsevier, 2023)[Abstract:] In this paper we propose a new arbitrary-order Finite Volume method for the numerical solution of the Euler and Navier-Stokes equations on unstructured grids. Arbitrary order is achieved using a modified Moving ... -
A numerical approach based on the BEM for computing transferred earth potentials in grounding analysis
Colominas, Ignasi; Navarrina, Fermín; Casteleiro, Manuel (2003)[Abstract] In this paper we present a numerical approach based on the Boundary Element Method for the analysis of a very common problem in electrical engineering practice: the existence of transferred earth potentials in ... -
A numerical approach for computing transferred potentials in grounding analysis
Colominas, Ignasi; Navarrina, Fermín; Gómez Calviño, Javier; Casteleiro, Manuel (2001) -
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 ...