Exploració per tema "Computational fluid dynamics"

Ara es mostren els items 21-40 de 605

    • A multi-method approach towards understanding the pathophysiology of aortic dissections – the complementary role of in-silico, in-vitro and in-vivo information 

      Rudenick, Paula; Bordoné, Maurizio; Bijnens, Bart; Soudah Prieto, Eduardo; Oñate Ibáñez de Navarra, Eugenio; Garcia Dorado, Antonio David; Evangelista, A. (Springer, 2010)
      Capítol de llibre
      Accés restringit per política de l'editorial
      Management and follow-up of chronic aortic dissections continues to be a clinical challenge due to progressive aortic dilatation. To predict dilatation, guidelines suggest follow-up of the aortic diameter. However, dilatation ...

    • A new general method to compute dispersion errors on Cartesian stretched meshes for both linear and non-linear operators 

      Ruano Pérez, Jesús; Baez Vidal, Aleix; Rigola Serrano, Joaquim; Trias Miquel, Francesc Xavier (2022-02-01)
      Article
      Accés restringit per política de l'editorial
      The present article presents a new analysis for the dispersion error and the methodology to evaluate it numerically. Here we present the spectral properties of several convective schemes, including non-linear ones, on ...

    • A new statistical model for subgrid dispersion in large eddy simulations of particle-laden flows 

      Muela Castro, Jordi; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (Institute of Physics (IOP), 2016)
      Text en actes de congrés
      Accés obert
      Dispersed multiphase turbulent flows are present in many industrial and commercial applications like internal combustion engines, turbofans, dispersion of contaminants, steam turbines, etc. Therefore, there is a clear interest ...

    • A numerical aerodynamic analysis on the effect of rear underbody diffusers on road cars 

      Guerrero Fernández, Alexandre; Castilla López, Roberto; Eid, Giorgio (Multidisciplinary Digital Publishing Institute, 2022-04-01)
      Article
      Accés obert
      The aerodynamic complexity of the underbody surfaces of conventional road vehicles is a matter of fact. Currently available literature is focused mainly on very simple Ahmed-body geometries as opposed to realistic car ...

    • A numerical set-up for the simulation of infection probability from SARS- CoV-2 in public transport vehicles 

      Schillaci, Eugenio; Vera i Fernández, Jordi; Morozova, Nina; Rigola Serrano, Joaquim (Scipedia, 2022)
      Text en actes de congrés
      Accés obert
      In this work, a numerical framework aimed at simulating the transport of contaminants and infectious agents within a closed domain is presented. The method employs mature CFD algorithms to calculate air fields with reasonable ...

    • A numerical strategy to compute optical parameters in turbulent flow: application to telescopes 

      Codina, Ramon; Baiges Aznar, Joan; Pérez Sánchez, Daniel; Collados, Manuel (2008-07-29)
      Article
      Accés obert
      We present a numerical formulation to compute optical parameters in a turbulent air flow. The basic numerical formulation is a large eddy simulation (LES) of the incompressible Navier-Stokes equations, which are approximated ...

    • A numerical study of liquid atomization regimes by means of conservative level-set simulations 

      Schillaci, Eugenio; Antepara Zambrano, Óscar; Balcázar Arciniega, Néstor; Rigola Serrano, Joaquim; Oliva Llena, Asensio (Elsevier, 2019-01-30)
      Article
      Accés obert
      In this work, a conservative level-set finite-volume solver for interface-capturing is employed to perform the direct numerical simulation of Liquid Jets discharging into a quiescent air chamber. The scope is to propose a ...

    • A numerical study on turbulent flow in an Inertial Particle Separator device 

      Bahramian, Linda; Amani, Ahmad; Rigola Serrano, Joaquim; Oliet Casasayas, Carles; Pérez Segarra, Carlos David (2023)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      An Inertia Particle Separator (IPS) is a device situated in the intake of the aircraft to remove particles from entering the engine; consisting of two types of outlets: core and scavenge. This work presents the numerical ...

    • A Parallel CFD Model for Wind Farms 

      Avila, Matías; Folch, Arnau; Houzeaux, Guillaume; Eguzkitza, Beatriz; Prieto, Luis; Cabezón, Daniel (Elsevier, 2013-06-01)
      Article
      Accés obert
      We present a Computational Fluid Dynamics (CFD) modeling strategy for onshore wind farms aimed at predicting and opti- mizing the production of farms using a CFD model that includes meteorological data assimilation, complex ...

    • A parallel three-dimensional radial basis function interpolation method for unstructured dynamic meshes 

      Estruch Pérez, Olga; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Pérez Segarra, Carlos David (2011)
      Comunicació de congrés
      Accés obert
      A radial basis function (RBF) interpolation method is implemented to be applied in computational fluid dynamics (CFD) problems with dynamic meshes. It is compared with the classic springs analogy smoothing, focusing on the ...

    • A PLIC-VOF implementation on parallel 3D unstructured meshes 

      Jofre Cruanyes, Lluís; Lehmkuhl Barba, Oriol; Castro González, Jesús; Oliva Llena, Asensio (2010)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The numerical simulation of interfacial and free surface ows is a vast and interesting topic in the areas of engineering and fundamental physics, such as the study of liquid-gas interfaces, formation of droplets, bubbles ...

    • A priori validation of CFD modelling of hydrocarbon pool fires 

      Rengel Darnaculleta, Francisco de Borja; Mata Miquel, Cristian; Pastor Ferrer, Elsa; Casal Fàbrega, Joaquim; Planas Cuchi, Eulàlia (2018-08-04)
      Article
      Accés obert
      Fires can be an important hazard for the safety of chemical and process industries. Particularly, pool fires are the most frequent fire scenarios in such facilities and can affect other equipment of the plant with severe ...

    • A Projected Ghost Fluid Method for a mimetic approach for extreme contrast interfaces in multiphase flows 

      Valle Marchante, Nicolás; Trias Miquel, Francesc Xavier; Castro González, Jesús; Oliva Llena, Asensio (2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In the context of a multimaterial domain, the GFM for the Laplacian operator is reformulated from an algebraic perspective, where operators are represented by matrices. From this perspective, a whole new level of analysis ...

    • A pseudo-DNS method for the simulation of incompressible fluid flows with instabilities at different scale 

      Idelsohn Barg, Sergio Rodolfo; Nigro, Norberto; Larreteguy, Axel; Gimenez, Juan Marcelo; Ryzhakov, Pavel (Springer, 2020-01)
      Article
      Accés obert
      In this work, a new model for the analysis of incompressible fluid flows with massive instabilities at different scales is presented. It relies on resolving all the instabilities at all scales without any additional model, ...

    • A pure virtual approach for managing platform portability on hybrid supercomputers 

      Álvarez Farré, Xavier; Gorobets, Andrei; Alsalti Baldellou, Àdel; Trias Miquel, Francesc Xavier (2019)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Commonly, the development of scientific computing software follows a stencilbased approach: the numerical methods and algorithms are introduced into computing systems through stencil data structures and sweeps (i.e. ...

    • A review study on the modeling of high-temperature solar thermal collector systems 

      Hachicha, Ahmed A.; Yousef, Bashria A.A.; Said, Zafar; Rodríguez Pérez, Ivette María (2019-09-01)
      Article
      Accés obert
      Concentrated solar power technologies are gaining more attention in the last two decades in order to replace the conventional power technologies and reduce their environmental impact. Among the developed concentrating ...

    • A simplified new multigrid algorithm of lattice Boltzmann method for steady states 

      An, Bo; Bergadà Granyó, Josep Maria; Sang, W.M (2023-02-01)
      Article
      Accés restringit per política de l'editorial
      In the present paper, a new strategy of multigrid method is introduced to accelerate the convergence speed of numerical simulations via lattice Boltzmann method. Based on the popular V-cycle multigrid algorithm, a simplified ...

    • A time-average filtering technique to improve the efficiency of two-layer wall models for large eddy simulation in complex geometries 

      Calafell Sandiumenge, Joan; Trias Miquel, Francesc Xavier; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio (Elsevier, 2019-06-30)
      Article
      Accés obert
      Two-Layer wall models have been recurrently studied since they represent a good physical model for Large Eddy Simulations with underresolved wall regions. Specifically, those based on the Reynolds Averaged Navier-Stokes ...

    • A Unified arbitrary lagrangian-eulerian model for fluid-structure interaction problems involving flows in flexible channels 

      Ryzhakov, Pavel; Martí, Julio Marcelo; Dialamishabankareh, Narges (2022)
      Article
      Accés obert
      In this work a finite element-based model for analyzing incompressible flows in flexible channels is presented. The model treats the fluid-solid interaction problem in a monolithic way, where the governing equations for ...

    • 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 ...