Listar Grupos de investigación por autor "Nogueira, Xesús"

Mostrando ítems 1-18 de 18

    • 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 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 short note on a 3D spectral analysis for turbulent flows on unstructured meshes 

      Tsoutsanis, Panagiotis; Nogueira, Xesús; Fu, Lin (Elsevier, 2023)
      [Abstract:] We propose two techniques for computing the energy spectra for 3D unstructured meshes that are consistent across different element types. These techniques can be particularly useful when assessing the dissipation ...

    • 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 ...

    • 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 ...

    • Machine learning-based WENO5 scheme 

      Nogueira, Xesús; Fernández-Fidalgo, Javier; Ramos, Lucía; Couceiro, Iván; Ramírez, Luis (Elsevier Ltd, 2024-08-15)
      [Abstract]: Machine learning (ML) is becoming a powerful tool in Computational Fluid Dynamics (CFD) to enhance the accuracy, efficiency, and automation of simulations. Currently, in the design of shock-capturing methods, ...

    • 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 ...

    • UCNS3D: An open-source high-order finite-volume unstructured CFD solver 

      Antoniadis, Antonis F.; Drikakis, Dimitris; Farmakis, Pericles S.; Fu, Lin; Kokkinakis, Ioannis; Nogueira, Xesús; Silva, Paulo A.S.F.; Skote, Martin; Titarev, Vladimir; Tsoutsanis, Panagiotis (Elsevier, 2022)
      [Abstract:] UCNS3D is an open-source computational solver for compressible flows on unstructured meshes. State-of-the-art high-order methods and their associated benefits can now be implemented for industrial-scale CFD ...

    • 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 ...

    • WENO Schemes on Unstructured Meshes Using a Relaxed a Posteriori MOOD Limiting Approach 

      Farmakis, Pericles S.; Tsoutsanis, Panagiotis; Nogueira, Xesús (Elsevier, 2020)
      [Abstract] In this paper a relaxed formulation of the a posteriori Multi-dimensional Optimal Order Detection (MOOD) limiting approach is introduced for weighted essentially non-oscillatory (WENO) finite volume schemes on ...