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Ara es mostren els items 1-20 de 27

    • A 3D low-order panel method for unsteady aerodynamic problems 

      Ortega, Enrique; Flores Le Roux, Roberto Maurice; Oñate Ibáñez de Navarra, Eugenio (2010)
      Report de recerca
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      An unsteady low-order panel method for three-dimensional subsonic analyses is presented. The method, which is based on well-established techniques in computational aerodynamics, is intended to achieve a cost-effective ...

    • A finite point method for adaptive three-dimensional compressible flow calculation 

      Ortega, Enrique; Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo (2008-10)
      Report de recerca
      Accés obert
      The Finite Point Method (FPM) is a meshless technique which is based on both, a Weighted Least-Squares numerical approximation on local clouds of points and a collocation technique which allows obtaining the discrete system ...

    • A finite point method for adaptive-three-dimensional compressible flow calculations 

      Ortega, Enrique; Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo (2009-07-30)
      Article
      Accés obert
      The finite point method (FPM) is a meshless technique, which is based on both, a weighted least-squares numerical approximation on local clouds of points and a collocation technique which allows obtaining the discrete ...

    • A meshless finite point method for three dimensional analysis of compressible flow problems involving moving boundaries and adaptivity 

      Ortega, Enrique; Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo; Flores Le Roux, Roberto Maurice (2013-10)
      Article
      Accés restringit per política de l'editorial
      A finite point method for solving compressible flow problems involving moving boundaries and adaptivity is presented. The numerical methodology is based on an upwind-biased discretization of the Euler equations, written ...

    • A meshless finite point method for three-dimensional analysis of compressible flow problems involving moving boundaries and adaptivity 

      Ortega, Enrique; Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo; Flores Le Roux, Roberto Maurice (2013-10)
      Article
      Accés obert
      A finite point method for solving compressible flow problems involving moving boundaries and adaptivity is presented. The numerical methodology is based on an upwind-biased discretization of the Euler equations, written ...

    • A numerical investigation of wind tunnel model deformations caused by the twin-sting support system 

      Flores Le Roux, Roberto Maurice; Ortega, Enrique; Oñate Ibáñez de Navarra, Eugenio (2009)
      Report de recerca
      Accés obert
      This work presents a wing deformation analysis of a twin-sting-mounted commercial aircraft model. Twin-sting arrangements minimize flow disturbances around the model fuselage and tail; on the other hand, they cause important ...

    • A numerical investigation of wind tunnel model deformations caused by the twin-sting support system 

      Flores Le Roux, Roberto Maurice; Ortega, Enrique; Oñate Ibáñez de Navarra, Eugenio (2010-03)
      Article
      Accés restringit per política de l'editorial
      The present work is part of a broader investigation aimed at improving the understanding of the aerodynamics of the rear aircraft section. Complex flow phenomena (e.g., the thick fuselage boundary layer at the rear end) ...

    • A simulation tool for parachute/payload systems 

      Flores Le Roux, Roberto Maurice; Ortega, Enrique; Vallés Fluvià, J.; Oñate Ibáñez de Navarra, Eugenio (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The design and evaluation of parachute-payload systems is a technology field in which numerical analysis tools can make very important contributions. This work describes a new development from CIMNE in this area, a coupled ...

    • A-posteriori error estimation for the finite point method with applications to compressible flow 

      Ortega, Enrique; Flores Le Roux, Roberto Maurice; Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo (2017-04)
      Article
      Accés obert
      An a-posteriori error estimate with application to inviscid compressible flow problems is presented. The estimate is a surrogate measure of the discretization error, obtained from an approximation to the truncation terms ...

    • Aeroelastic analysis of parachute deceleration systems with empirical aerodynamics 

      Ortega, Enrique; Flores Le Roux, Roberto Maurice (2019-11-13)
      Article
      Accés obert
      A technique for the aeroelastic solution of parachute decelerators is presented in this work. The methodology uses empirical aerodynamics, based on a filling-time inflation model and Ludtke's area law, coupled to two ...

    • An edge-based solver for compressible flow 

      Ortega, Enrique; Flores Le Roux, Roberto Maurice; Oñate Ibáñez de Navarra, Eugenio (2005-10)
      Report de recerca
      Accés obert
      An edge-based high-resolution scheme for the solution of the compressible Euler equations on unstructured finite elements grids is presented. The flow solver adopted in the present work is the approximate Riemann solver ...

    • An implicit unsteady hydraulic solver for suspended cuttings transport in managed pressure wells 

      Flores Le Roux, Roberto Maurice; Ortega, Enrique; Ilin, A.; Simpkins, Douglas; Oñate Ibáñez de Navarra, Eugenio (Springer, 2019-04)
      Article
      Accés obert
      We present a simulation tool for transient events in complex hydraulic networks. The code includes modelling of the transport of suspended cuttings in near-vertical wells. An unstructured finite volume formulation with ...

    • Application of the finite point method to high- Reynolds number compressible flow problems 

      Ortega, Enrique; Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo; Flores Le Roux, Roberto Maurice (2014-04)
      Article
      Accés restringit per política de l'editorial
      In this work, the finite point method is applied to the solution of high-Reynolds compressible viscous flows. The aim is to explore this important field of applications focusing on two main aspects: the easiness and ...

    • Comparative accuracy and performance assessment of the finite point method in compressible flow problems 

      Ortega, Enrique; Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo; Flores Le Roux, Roberto Maurice (Elsevier, 2014-01-20)
      Article
      Accés restringit per política de l'editorial
      A comparative assessment of the Finite Point Method (FPM) is presented. Using a wing-fuselage configuration under transonic inviscid flow conditions as reference test case, the performance of the FPM flow solver is compared ...

    • Development and applications of the Finite Point Method to compressible aerodynamics problems 

      Ortega, Enrique (Universitat Politècnica de Catalunya, 2014-05-12)
      Tesi
      Accés obert
      This work deals with the development and application of the Finite Point Method (FPM) to compressible aerodynamics problems. The research focuses mainly on investigating the capabilities of the meshless technique to address ...

    • Development and applications of the finite point method to compressible aerodynamics problems 

      Ortega, Enrique; Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
      Llibre
      Accés obert
      En este trabajo se aborda el desarrollo del Método de Puntos Finitos (MPF) y su aplicación a problemas de aerodinámica de flujos compresibles. El objetivo principal es investigar el potencial de la técnica sin malla para ...

    • Efficient aeroelastic analysis of inflatable structures using enhanced potential flow aerodynamics 

      Ortega, Enrique; Flores Le Roux, Roberto Maurice; Cuartero Zaragoza, Eric; Oñate Ibáñez de Navarra, Eugenio (2019-10)
      Article
      Accés obert
      An efficient method for the aeroelastic analysis of wind effects on inflatable structures is presented. The solution scheme is staggered and uses an explicit finite-element structural solver and potential flow aerodynamics. ...

    • Efficient aeroelastic analysis of wind loads on inflatable hangars 

      Flores Le Roux, Roberto Maurice; Ortega, Enrique (International Centre for Numerical Methods in Engineering (CIMNE), 2019)
      Text en actes de congrés
      Accés obert
      Wind loads play a crucial role in inflatable structures. Unfortunately, design loads from safety regulations grossly overestimate the real aerodynamic forces. Thus, a more accurate estimation of wind loads is desirable. ...

    • Explicit dynamic analysis of thin membrane structures 

      Flores Le Roux, Roberto Maurice; Ortega, Enrique; Oñate Ibáñez de Navarra, Eugenio (2011-02)
      Report de recerca
      Accés obert
      An explicit dynamic structural solver developed at CIMNE for the analysis of parachutes is presented. The canopy fabric has a negligible out-of-plane stiffness, therefore its numerical study presents important challenges. ...

    • Finite point method to solve shallow water equations 

      Ortega, Enrique; Oñate Ibáñez de Navarra, Eugenio; Idelsohn Barg, Sergio Rodolfo; Buachart, Chinapat (John Wiley & Sons, 2011-10)
      Article
      Accés restringit per política de l'editorial
      An adaptive Finite Point Method (FPM) for solving shallow water problems is presented. The numerical methodology we propose, which is based on weighted-least squares approximations on clouds of points, adopts an upwind-biased ...