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Ara es mostren els items 10-23 de 23

    • Large Eddy Simulation of airflow in a single family house 

      Mohan Damle, Rashmin; Soria Guerrero, Manel; Lehmkuhl Barba, Oriol; Colomer Rey, Guillem; Oliva Llena, Asensio (2010)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      This work is addressed to contribute to the progress in the determination of indoor air flow in buildings. The air flow in such environments is caused by natural convection, stack and wind effects, infiltration of ambient ...

    • Mixed convection in a ventilated 3D cavity : comparison of different LES models with experimental data 

      Mohan Damle, Rashmin; Lehmkuhl Barba, Oriol; Colomer Rey, Guillem (2011)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The aim of this work is to contribute to the progress in the determination of indoor airflow in buildings and to explore the possibility of coarse grid CFDsimulations for room airflow in building energy programs. To do ...

    • Modelization of a molten salt thermal energy storage for concentrated solar power 

      Vera i Fernández, Jordi; Colomer Rey, Guillem; Sanmartí Perona, Oriol; Pérez Segarra, Carlos David (Scipedia, 2022)
      Text en actes de congrés
      Accés obert
      A numerical model for studying a storage tank for concentrated solar power is presented. The model consists of solving the heat equation for the solid part made from ceramic materials, a one-dimensional model for the molten ...

    • Modular simulation of buildings with an object-oriented tool 

      Mohan Damle, Rashmin; Lehmkuhl Barba, Oriol; Colomer Rey, Guillem (2011)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The objective of this work is to develop a modular object-oriented building simulation tool “NEST” (Numerical Edifice Simulation Tool) which can be coupled with a parallel CFD software. To do so, a building is modelled as ...

    • Numerical methods for radiative heat transfer 

      Colomer Rey, Guillem (Universitat Politècnica de Catalunya, 2006-06-26)
      Tesi
      Accés obert
      L'objectiu principal d'aquesta tesi es l'estudi de la transferència d'energia per radiació. Per aquest motiu, s'ha estudiat la fenomenologia bàsica de la transferencia de calor per radiació. Tenint en compte el tipus ...

    • Numerical simulations of conjugate convection combined with surface thermal radiation using an Immersed-Boundary Method 

      Favre Samarra, Federico; Colomer Rey, Guillem; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio (Institute of Physics (IOP), 2016)
      Text en actes de congrés
      Accés obert
      Dynamic and thermal interaction problems involving fluids and solids were studied through a finite volume based Navier-Stokes solver, combined with immersed-boundary techniques and the net radiation method. Source terms ...

    • Numerical simulations of turbulent natural convection coupled and uncoupled with radiation 

      Capdevila Paramio, Roser; Lehmkuhl Barba, Oriol; Trias Miquel, Francesc Xavier; Colomer Rey, Guillem; Pérez Segarra, Carlos David (2011)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      In the present work, turbulent natural convection in a tall differentially heated cavity of aspect ratio 5:1, filled with air (Pr = 0.7) under a Rayleigh number based on the height of 4.5 · 1010, is studied numerically. ...

    • Parallel algorithm for the solution of the Boltzmann transport equation on unstructured meshes 

      Colomer Rey, Guillem; Borrell Pol, Ricard; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David (2011)
      Comunicació de congrés
      Accés obert
      The Boltzmann transport equation is solved by means of a parallel explicit algorithm known as parallel sweep, and a source iteration procedure to solve the coupling between different angular directions. Using an explicit ...

    • Parallel sweep-based preconditioner for the solution of the linear Boltzmann transport equation 

      Borrell Pol, Ricard; Colomer Rey, Guillem; Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Oliva Llena, Asensio (Elsevier, 2013-12-15)
      Article
      Accés restringit per política de l'editorial
      The Boltzmann transport equation is solved in the context of radiative heat transfer, for an isotropically scattering medium with reflecting boundaries. Under these circumstances, the different ordinates of the angular ...

    • Reliable overnight industrial LES: challenges and limitations. Application to CSP technologies 

      Alsalti Baldellou, Àdel; Colomer Rey, Guillem; Hopman, Johannes Arend; Álvarez Farré, Xavier; Gorobets, Andrei; Trias Miquel, Francesc Xavier; Pérez Segarra, Carlos David; Oliva Llena, Asensio (European Research Community on Flow, Turbulence, and Conbustion (ERCOFTAC), 2023)
      Text en actes de congrés
      Accés obert
      Preserving the operators’ symmetries at the discrete level is crucial to enable reliable DNS and LES simulations of turbulent flows. Moreover, real-world applications demand robust and stable numerical methods suitable for ...

    • Study of turbulent natural convection in a tall differentially heated cavity filled with either non-participating, participating grey and participating semigrey media 

      Capdevila Paramio, Roser; Lehmkuhl Barba, Oriol; Colomer Rey, Guillem; Pérez Segarra, Carlos David (Université de Poitiers, 2012)
      Text en actes de congrés
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      Turbulent natural couvection in a tall differentially heated cavity of aspect ratio 5:1, filled with air under a Rayleigh number based on the height of 4.5.10(10), is studied numerically. Three different situations have ...

    • Turbulence modelling and numerical issues: from RANS to DNS and LES 

      Pérez Segarra, Carlos David; Lehmkuhl Barba, Oriol; Jaramillo Ibarra, Julian Ernesto; Colomer Rey, Guillem; Oliva Llena, Asensio (2009)
      Comunicació de congrés
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      The objective of this work is to show possibilities and limitations of different turbulence models from RANS to DNS and LES. Firstly, standard approaches based on time averaging the governing equations (the so called ...

    • Turbulent natural convection in a differentially heated cavity of aspect ratio 5 filled with non-participating and participating grey media 

      Capdevila Paramio, Roser; Lehmkuhl Barba, Oriol; Trias Miquel, Francesc Xavier; Pérez Segarra, Carlos David; Colomer Rey, Guillem (2011)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      In the present work, turbulent natural convection in a tall differentially heated cavity of aspect ratio 5:1, filled with air (Pr = 0.7) under a Rayleigh number based on the height of 4.5 centerdot 1010, is studied ...

    • Turbulent radial outflow between coaxial parallel disks 

      Rigola Serrano, Joaquim; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Colomer Rey, Guillem (2009)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      A numerical simulation of the radial outflow between two parallel concentric disks has been carried out by means of the numerical resolution of the Navier-Stokes and continuity equations in a three dimensional unstructured ...