Listar GI-GMNE - Artigos por autor "Ramírez, Luis"
Mostrando ítems 1-16 de 16
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A high-order finite volume method with improved isotherms reconstruction for the computation of multiphase flows using the Navier–Stokes–Korteweg equations
Martínez, Abel; Ramírez, Luis; Nogueira, Xesús; Khelladi, Sofiane; Navarrina, Fermín (Elsevier, 2020)[Abstract] In this work we solve the Navier–Stokes–Korteweg (NSK) equations to simulate a two-phase fluid with phase change. We use these equations on a diffuse interface approach, where the properties of the fluid vary ... -
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 Mathematical Model to Evaluate the Impact of the Maintenance Strategy on the Service Life of Flexible Pavements
Ruiz, Manuel; Ramírez, Luis; Navarrina, Fermín; Aymerich, Mario; López-Navarrete, David (Hindawi, 2019)[Abstract] The structural failure of a flexible pavement occurs when the accumulated fatigue damage produced by all the vehicles that have passed over each section exceeds a certain threshold. For this reason, the service ... -
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 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 ... -
An Arbitrary Lagrangian-Eulerian SPH-MLS Method for the Computation of Compressible Viscous Flows
Ramírez, Luis; Eirís, Antonio; Couceiro, Iván; París, José; Nogueira, Xesús (Elsevier, 2022)[Abstract] In this work we present a high-accurate discretization to solve the compressible Navier-Stokes equations using an Arbitrary Lagrangian-Eulerian meshless method (SPH-MLS), which can be seen as a general formulation ... -
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 ... -
Improved δ-SPH Scheme With Automatic and Adaptive Numerical Dissipation
Krimi, Abdelkader; Ramírez, Luis; Khelladi, Sofiane; Navarrina, Fermín; Deligant, Michaël; Nogueira, Xesús (MDPI, 2020)[Abstract] In this work we present a δ-Smoothed Particle Hydrodynamics (SPH) scheme for weakly compressible flows with automatic adaptive numerical dissipation. The resulting scheme is a meshless self-adaptive method, in ... -
MLS-SPH-ALE: A Review of Meshless-FV Methods and a Unifying Formulation for Particle Discretizations
Eirís, Antonio; Ramírez, Luis; Couceiro, Iván; Fernández-Fidalgo, Javier; París, José; Nogueira, Xesús (Springer, 2023)[Abstract:] Mesh-based and particle methods were conceived as two different discretization strategies to solve partial differential equations. In the last two decades computational methods have diversified and a myriad of ... -
Numerical assessment of fan blades screen effect on fan/OGV interaction tonal noise
Foulquié, Charles; Khelladi, Sofiane; Deligant, Michael; Ramírez, Luis; Nogueira, Xesús; Mardjono, Jacky (Elsevier, 2020)[Abstract:] This work deals with sound generation and transmission in a fan stage. The study is done on a subsonic Fan stage and interaction noise between the fan wakes and the Outlet Guide Vanes (OGV) is considered. For ... -
Smoothed Particle Hydrodynamics: A consistent model for interfacial multiphase fluid flow simulations
Krimi, Abdelkader; Rezoug, Mehdi; Khelladi, Sofiane; Nogueira, Xesús; Deligant, Michael; Ramírez, Luis (Elsevier, 2018)[Abstract:] In this work, a consistent Smoothed Particle Hydrodynamics (SPH) model to deal with interfacial multiphase fluid flows simulation is proposed. A modification to the Continuum Stress Surface formulation (CSS) ... -
SPH-ALE Scheme for Weakly Compressible Viscous Flow with a Posteriori Stabilization
Eirís, Antonio; Ramírez, Luis; Fernández-Fidalgo, Javier; Couceiro, Iván; Nogueira, Xesús (MDPI, 2021)[Abstract] A highly accurate SPH method with a new stabilization paradigm has been introduced by the authors in a recent paper aimed to solve Euler equations for ideal gases. We present here the extension of the method to ... -
Very high-order method on immersed curved domains for finite difference schemes with regular Cartesian grids
Fernández-Fidalgo, Javier; Nogueira, Xesús; Ramírez, Luis; Colominas, Ignasi; Clain, Stéphane (Elsevier, 2020)[Abstract:] A new very high-order technique for solving conservation laws with curved boundary domains is proposed. A Finite Difference scheme on Cartesian grids is coupled with an original ghost cell method that provide ...