Now showing items 1-12 of 364

    • Optimization of the progress variable definition using a genetic algorithm for the combustion of complex fuels 

      Both, Ambrus; Mira Martínez, Daniel; Lehmkuhl Barba, Oriol (MCM, 2021)
      Conference lecture
      Open Access
      In this work counterflow diffusion flamelets of n-heptane and air are used at stable and unsteady extinguishing conditions for building a thermo-chemical database for Computational Fluid Dynamics (CFD) calculations. The ...
    • High-fidelity simulations of the mixing and combustion of a technically premixed hydrogen flame 

      Mira Martínez, Daniel; Both, Ambrus; Lehmkuhl Barba, Oriol; Gomez Gonzalez, Samuel; Forck, Jonathan; Tanneberger, Tom; Stathopoulos, Panagiotis; Paschereit, Christian Oliver (MCM, 2021)
      Conference lecture
      Open Access
      Numerical simulations are used here to obtain further understanding on the flashback mechanism of a technically premixed hydrogen flame operated in lean conditions. Recent work from the authors (Mira et al., 2020) showed ...
    • Energy preserving multiphase flows: applications to falling films 

      Valle Marchante, Nicolás; Trias Miquel, Francesc Xavier; Castro González, Jesús (2021)
      Conference report
      Open Access
      The numerical simulation of multiphase flows presents several challenges, namely the transport of different phases within de domain and the inclusion of capillary effects. Here, these are approached by enforcing a discrete ...
    • Development of a reduced order model of solar heat gains prediction 

      Tamm, Meril; Macià, Jordi; Capdevila Paramio, Roser; Farnós Baulenas, Joan; Thalfeldt, Martin; Kurnitski, Jarek (2020-12-01)
      Article
      Open Access
      The aim of this study was to elaborate and validate a reduced order model able to forecast solar heat gains as a function of the architectural parameters that determine the solar heat gains. The study focused on office ...
    • A comprehensive simulation tool for adsorption-based solar-cooled buildings. Control strategy based on variable cycle duration 

      Papakokkinos, Giorgos; Castro González, Jesús; Capdevila Paramio, Roser; Damble, Rashmin (2021-01-15)
      Article
      Restricted access - publisher's policy
      Adsorption cooling systems (ACS) may contribute towards a sustainable way of satisfying the increasing cooling demand, as they utilize solar thermal energy and employ non-ozone-depleting substances. Apart from the intrinsic ...
    • A scalable framework for the partitioned solution of fluid-structure interaction problems 

      Naseri, Alireza; Totounferoush, Amin; González Acedo, Ignacio; Mehl, Miriam; Pérez Segarra, Carlos David (Springer, 2020-08)
      Article
      Restricted access - publisher's policy
      In this work, we present a scalable and efficient parallel solver for the partitioned solution of fluid–structure interaction problems through multi-code coupling. Two instances of an in-house parallel software, TermoFluids, ...
    • On the feasibility of affordable high-fidelity CFD simulations for indoor environment design and control 

      Morozova, Nina; Trias Miquel, Francesc Xavier; Capdevila Paramio, Roser; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2020-10-15)
      Article
      Restricted access - publisher's policy
      Computational fluid dynamics (CFD) is a reliable tool for indoor environmental applications. However, accurate CFD simulations require large computational resources, whereas significant cost reduction can lead to unreliable ...
    • A hierarchical parallel implementation for heterogeneous computing. Application to algebra-based CFD simulations on hybrid supercomputers 

      Álvarez Farré, Xavier; Gorobets, Andrey; Trias Miquel, Francesc Xavier (Elsevier, 2021-01)
      Article
      Restricted access - publisher's policy
      The quest for new portable implementations of simulation algorithms is motivated by the increasing variety of computing architectures. Moreover, the hybridization of high-performance computing systems imposes additional ...
    • Tetrahedral adaptive mesh refinement for two-phase flows using conservative level-set method 

      Antepara Zambrano, Óscar; Balcázar Arciniega, Néstor; Oliva Llena, Asensio (2021-02)
      Article
      Restricted access - publisher's policy
      In this article, we describe a parallel adaptive mesh refinement strategy for two-phase flows using tetrahedral meshes. The proposed methodology consists of combining a conservative level-set method with tetrahedral adaptive ...
    • Transient model for the development of an air-cooled LiBr-H2O absorption chiller based on heat and mass transfer empirical correlations 

      Castro González, Jesús; Farnós Baulenas, Joan; Papakokkinos, Giorgos; Zheng, Jian; Oliet Casasayas, Carles (Elsevier, 2020-12)
      Article
      Restricted access - publisher's policy
      This work describes transient numerical modeling of a direct air-cooled,single-effect absorption chiller. The model is lumped parametric based on transient mass, momentum, and energy balances, applied to the internal ...
    • Fluid-structure interaction based on HPC multicode coupling 

      Cajas García, Juan Carlos; Houzeaux, Guillaume; Vázquez, Mariano; Garcia Gasulla, Marta; Casoni Rero, Eva; Calmet, Hadrien; Artigues, Antoni; Borrell Pol, Ricard; Lehmkuhl Barba, Oriol; Pastrana Maldonado, Daniel; Yáñez, David; Pons, Ramon; Martorell Lopez, Jordi (2018)
      Article
      Restricted access - publisher's policy
      The fluid-structure interaction (FSI) problem has received great attention in the last few years, mainly because it is present in many physical systems, industrial applications, and almost every biological system. In the ...
    • On a Proper Tensor-Diffusivity Model for Large-Eddy Simulation of Buoyancy-Driven Turbulence 

      Trias Miquel, Francesc Xavier; Dabbagh, Firas; Gorobets, Andrei; Oliet Casasayas, Carles (Springer, 2020-03-26)
      Article
      Open Access
      In this work, we aim to shed light to the following research question: can we find a nonlinear tensorial subgrid-scale (SGS) heat flux model with good physical and numerical properties, such that we can obtain satisfactory ...