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Ara es mostren els items 65-84 de 115

    • Hyper-reduction for Petrov–Galerkin reduced order models 

      Ares de Parga Regalado, Sebastian; Bravo Martínez, José Raúl; Hernández Ortega, Joaquín Alberto; Zorrilla Martínez, Rubén; Rossi, Riccardo (Elsevier, 2023-11)
      Article
      Accés restringit per política de l'editorial
      Projection-based Reduced Order Models are based on the idea of minimizing the discrete residual of a “full order model” (FOM) while at the same time constraining the unknowns to live in a space of reduced dimension. For ...

    • Implementation of a general algorithm for incompressible and compressible flows within the multi-physics code KRATOS and preparation of fluid-structure coupling 

      May, M.; Rossi, Riccardo; Oñate Ibáñez de Navarra, Eugenio (2008-11)
      Report de recerca
      Accés obert
      This diploma thesis deals with the implementation of a fluid solver for incompressible and compressible flows within the multi-physics framework Kratos. The presentation of this environment based on the finite element ...

    • Implementation of a generalized exponential basis functions method for linear and non-linear problems 

      Mossaiby, Farshid; Ghaderian, M; Rossi, Riccardo (John Wiley & Sons, 2015-07)
      Article
      Accés obert
      In this paper, we address shortcomings of the method of exponential basis functions (EBF) by extending it to general linear and non-linear problems. In linear problems, the solution is approximated using a linear combination ...

    • Lagrangian analysis of multiscale particulate flows with the particle finite element method 

      Oñate Ibáñez de Navarra, Eugenio; Celigueta Jordana, Miguel Ángel; Latorre Sánchez, Juan Salvador; Casas González, Guillermo; Rossi, Riccardo; Rojek, Jerzy (Springer, 2014-05)
      Article
      Accés obert
      We present a Lagrangian numerical technique for the analysis of flows incorporating physical particles of different sizes. The numerical approach is based on the particle finite element method (PFEM) which blends concepts ...

    • Lagrangian FE methods for coupled problems in fluid mechanics 

      Ryzhakov, Pavel; Oñate Ibáñez de Navarra, Eugenio; Rossi, Riccardo; Idelsohn Barg, Sergio Rodolfo (International Centre for Numerical Methods in Engineering (CIMNE), 2010)
      Llibre
      Accés obert
      This work aims at developing formulations and algorithms where maximum advantage of using Lagrangian finite element fluid formulations can be taken. In particular we concentrate our attention at fluid-structure interaction ...

    • Lock-in and drag amplification effects in slender line-like structures through CFD 

      Vasallo Belver, Alí; Lorenzana Iban, Antolin; Rossi, Riccardo (2012-05)
      Article
      Accés restringit per política de l'editorial
      Lock-in and drag amplification phenomena are studied for a flexible cantilever using a simplified fluid-structure interaction approach. Instead of solving the 3D domain, a simplified setup is devised, in which 2D flow ...

    • Machine-learning model for the determination of macro-scale masonry properties based on a virtual laboratory at micro-scale 

      Kalkbrenner, Philip; Pelà, Luca; Rossi, Riccardo (International Centre for Numerical Methods in Engineering (CIMNE), 2021)
      Text en actes de congrés
      Accés obert
      Cutting-edge methods in the computational analysis of structures have been developed over the last decades. Such modern tools are helpful to assess the safety of existing buildings. Multi-scale techniques have been proposed ...

    • Mejora de la solución fuertemente acoplada de problemas FSI mediante una aproximación de la matriz tangente de presión 

      Rossi, Riccardo; Idelsohn Barg, Sergio Rodolfo; Oñate Ibáñez de Navarra, Eugenio; Cotela Dalmau, Jordi; Del Pin, F. (Universitat Politècnica de Catalunya. CIMNE, 2011-01)
      Article
      Accés obert
      La interacción de los fluidos con las estructuras de su entorno es un desafío clásico para las técnicas numéricas. El objetivo de este trabajo es doble: en primer lugar se proporciona una explicación teórica simple de los ...

    • Melting and spread of polymers in fire with the particle finite element method 

      Oñate Ibáñez de Navarra, Eugenio; Rossi, Riccardo; Butler, Kathryn M.; Idelsohn Barg, Sergio Rodolfo (2009)
      Report de recerca
      Accés obert
      A new computational procedure for analysis of the melting and flame spread of polymers under fire conditions is presented. The method, termed Particle Finite Element Method (PFEM), combines concepts from particle-based ...

    • Metodología de análisis de comportamiento de presas de escollera frente a un sobrevertido 

      Larese De Tetto, Antonia; Rossi, Riccardo; Oñate Ibáñez de Navarra, Eugenio; Toledo Municio, Miguel Ángel (2010)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Con el objetivo de llegar a un mejor conocimiento del principio del proceso de rotura de las presas de material suelto y obtener una herramienta que permita un análisis más riguroso de este fenómeno, se está desarrollando ...

    • Micro-scale continuous and discrete numerical models for nonlinear analysis of masonry shear walls 

      Petracca, Massimo; Pelà, Luca; Rossi, Riccardo; Zaghi, Stefano; Camata, Guido; Spacone, Enrico (2017-09)
      Article
      Accés obert
      A novel damage mechanics-based continuous micro-model for the analysis of masonry-walls is presented and compared with other two well-known discrete micro-models. The discrete micro-models discretize masonry micro-structure ...

    • Migration of a generic multi-physics framework to HPC environments 

      Dadvand, Pooyan; Rossi, Riccardo; Gil, Marisa; Martorell Bofill, Xavier; Cotela Dalmau, Jordi; Juanpere, E.; Idelsohn Barg, Sergio Rodolfo; Oñate Ibáñez de Navarra, Eugenio (Elsevier, 2013-07)
      Article
      Accés obert
      Creating a highly parallelizable code is a challenge specially for distributed memory machines (DMMs). Moreover, algorithms and data structures suitable for these platforms can be very different from the ones used in serial ...

    • Migration of a generic multi-physics framework to HPC environments 

      Dadvand, Pooyan; Rossi, Riccardo; Gil, Marisa; Martorell Bofill, Xavier; Cotela Dalmau, Jordi; Juanpere, E.; Idelsohn Barg, Sergio Rodolfo; Oñate Ibáñez de Navarra, Eugenio (2011)
      Text en actes de congrés
      Accés obert
      Creating a highly parallelizable code is a challenge and development for distributed memory machines (DMMs) can be very different form developing a serial code in term of algorithms and structure. For this reason, many ...

    • Modelling and simulation of the sea-landing of aerial vehicles using the Particle Finite Element Method 

      Ryzhakov, Pavel; Rossi, Riccardo; Viña, Adria; Oñate Ibáñez de Navarra, Eugenio (2013-07)
      Article
      Accés obert
      In this paper the Particle Finite Element Method (PFEM) is applied to the simulation of the sea-landing of an unmanned aerial vehicle (UAV). The problem of interest consists in modelling the impact of the vehicle against ...

    • Multiscale computational first order homogenization of thick shells for the analysis of out-of-plane loaded masonry walls 

      Petracca, Massimo; Pelà, Luca; Rossi, Riccardo; Oller Martínez, Sergio Horacio; Camata, Guido; Spacone, Enrico (2017-03)
      Article
      Accés obert
      This work presents a multiscale method based on computational homogenization for the analysis of general heterogeneous thick shell structures, with special focus on periodic brick-masonry walls. The proposed method is ...

    • Multiscale thermo-mechanical analysis of multi-layered coatings in solar thermal applications 

      Montero-Chacón, Francisco; Zaghi, Stefano; Rossi, Riccardo; García-Pérez, Elena; Heras Pérez, Irene; Martínez García, Javier; Oller Martínez, Sergio Horacio; Doblaré, Manuel (2017-05)
      Article
      Accés obert
      Solar selective coatings can be multi-layered materials that optimize the solar absorption while reducing thermal radiation losses, granting the material long-term stability. These layers are deposited on structural materials ...

    • Nuevo modelo discreto multiescala (DM) para análisis no-lineales de materiales compuestos 

      Zaghi, Stefano; Martínez García, Javier; Rossi, Riccardo (2018-10-15)
      Article
      Accés obert
      En los últimos años el estudio del comportamiento de los materiales a nivel microscópico ha aumentado significativamente en términos de diseño de materiales de altas prestaciones. A pesar de los recientes avances de ...

    • Numerical and experimental analysis of the structural performance of AM components built by fused filament fabrication 

      Dialamishabankareh, Narges; Chiumenti, Michele; Cervera Ruiz, Miguel; Rossi, Riccardo; Chasco, Uxue; Domingo, Miquel (Springer, 2021-03)
      Article
      Accés restringit per política de l'editorial
      This work analyses the performance of parts built by Additive Manufacturing (AM) using Fused Filament Fabrication (FFF) demonstrating the correlation between the printing orientation and structural performance. FFF components ...

    • Numerical and experimental study of overtopping and failure of rockfill dams 

      Larese De Tetto, Antonia; Rossi, Riccardo; Oñate Ibáñez de Navarra, Eugenio; Toledo Municio, Miguel Ángel; Morán Moya, Rafael; Campos, Hibber (2015-08)
      Article
      Accés restringit per política de l'editorial
      This paper aims to present and validate a numerical technique for the simulation of the overtopping and onset of failure in rockfill dams due to mass sliding. This goal is achieved by coupling a fluid dynamic model for the ...

    • Numerical modeling of the hydraulic performance of Oliana dam spillway using Kratos 

      Salazar, Fernando; Morán Moya, Rafael; Rossi, Riccardo; Larese De Tetto, Antonia (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Head-discharge curves in gated spillways are commonly obtained by means of the application of empirical formulations. The most popular one, recommended by SPANCOLD [1], was developed by the U.S. Army Corps of Engineers ...