Listar GI-GMNE - Artigos por autor "Colominas, Ignasi"
Mostrando ítems 1-20 de 34
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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 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 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 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 ... -
A reduced-dissipation WENO scheme with automatic dissipation adjustment
Fernández-Fidalgo, Javier; Ramírez, Luis; Tsoutsanis, Panagiotis; Colominas, Ignasi; Nogueira, Xesús (Elsevier, 2020)[Abstract:] In this paper, we propose a novel modification to the WENO-family schemes to reduce its intrinsic dissipation. In this work, we focus on the WENO5 scheme, which is rewritten in terms of a central plus a dissipative ... -
A very accurate Arbitrary Lagrangian–Eulerian meshless method for Computational Aeroacoustics
Nogueira, Xesús; Ramírez, Luis; Colominas, Ignasi; Khelladi, Sofiane; Krimi, Abdelkader (Elsevier, 2018)[Abstract:] In this work, we propose a new meshless approach based on a Galerkin discretization of a set of conservation equations on an Arbitrary Lagrangian–Eulerian framework. In particular, we solve the Linearized Euler ... -
A Well-Balanced SPH-ALE Scheme for Shallow Water Applications
Prieto Arranz, Alberto; Ramírez, Luis; Couceiro, Iván; Colominas, Ignasi; Nogueira, Xesús (Springer, 2021)[Abstract] In this work, a new discretization of the source term of the shallow water equations with non-flat bottom geometry is proposed to obtain a well-balanced scheme. A Smoothed Particle Hydrodynamics Arbitrary ... -
An a posteriori, efficient, high-spectral resolution hybrid finite-difference method for compressible flows
Fernández-Fidalgo, Javier; Nogueira, Xesús; Ramírez, Luis; Colominas, Ignasi (Elsevier, 2018)[Abstract:] A high-order hybrid method consisting of a high-accurate explicit finite-difference scheme and a Weighted Essentially Non-Oscillatory (WENO) scheme is proposed in this article. Following this premise, two ... -
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]. ... -
Aplicación de una formulación de elementos finitos para la resolución del flujo en unidades de proceso de aguas residuales
Vellando, Pablo; Puertas, Jerónimo; Colominas, Ignasi; Suárez-López, Joaquín; Gil de Bernabé, José (Fundación para el Fomento de la Ingeniería del Agua, 2003)[Resumen] En el presente trabajo se exponen los resultados de la aplicación de una formulación numérica propuesta por los autores, en la resolución de varios problemas de flujo relacionados con el tratamiento de aguas ... -
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 ... -
Computational modelling suggests complex interactions between interstitial flow and tumour angiogenesis
Vilanova, Guillermo; Burés Muñiz, Miguel; Colominas, Ignasi; Gómez, Héctor (Royal Society, 2018)[Abstract:] Angiogenesis, the growth of capillaries from pre-existing ones, plays a key role in cancer progression. Tumours release tumour angiogenic factors (TAFs) into the extracellular matrix (ECM) that trigger angiogenesis ... -
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 ... -
Computer software for analysis and design optimization of power transmission structures by simulated annealing and sensitivity analysis
Couceiro, Iván; París, José; Navarrina, Fermín; Colominas, Ignasi; Martínez Varela, Santiago (Springer, 2021)[Abstract:] This paper presents a computer software for the optimization of power transmission structures. The software employs a modified version of the Simulated Annealing algorithm that has been proven effective in large ... -
Estimation of long-term fatigue damage of fixed substructures using fully-coupled models and non-linear dynamic analysis
Couceiro, Iván; París, José; Navarrina, Fermín; Colominas, Ignasi; Ramírez, Luis (Elsevier, 2020)[Abstract:] Typical industry models for Offshore Wind Turbines with fixed substructures are based on decoupled models between the wind turbine and the substructure. It is proved that the complete dynamic response of the ... -
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 ...