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  • Numerical analysis of parcel tracking in large eddy simulation of polydispersed multiphase flows: assessment of different parcel modeling techniques 

    Bahramian, Linda; Trias Miquel, Francesc Xavier; Oliet Casasayas, Carles; Pérez Segarra, Carlos David (2023)
    Conference report
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    In order to assess the impacts of parcel modeling, the Eulerian-Lagrangian method, by using the Particle-In-Cell model, is implemented for a three-dimensional polydispersed two-phase turbulent flow. First, the benchmark ...
  • 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)
    Conference report
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    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 ...
  • DNS and LES of buoyancy-driven turbulence at high Rayleigh numbers: numerical methods and SGS models 

    Trias Miquel, Francesc Xavier; Álvarez Farré, Xavier; Santos Serrano, Daniel; Gorobets, Andrei; Oliva Llena, Asensio (Springer, 2022)
    Conference report
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    Buoyancy-driven flows have always been an important subject of scientific studies with numerous applications in environment and technology.
  • Assessment of grey-area mitigation techniques and their effects on jet aerodynamics and aeroacoustics 

    Ruano Pérez, Jesús; Duben, Alexey; Gorobets, Andrei; Trias Miquel, Francesc Xavier (Begell House, 2023)
    Conference report
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  • On a checkerboard-free, conservative method for turbulent flows 

    Hopman, Johannes Arend; Alsalti Baldellou, Àdel; Trias Miquel, Francesc Xavier; Rigola Serrano, Joaquim (Begell House, 2023)
    Conference report
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    In computational fluid dynamics (CFD), the checkerboard problem remains a challenging issue when employing collocated grid arrangements for complex geometries. It manifests as oscillatory and nonphysical pressure modes, ...
  • Falling film characteristic numerical modelling and experimental validation 

    Zheng, Jian; Chen, Yuanxiang; Plana Riu, Josep; Sanmartí Perona, Oriol; Castro González, Jesús (Begell House, 2023)
    Conference report
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    This paper presents a study on the falling film characteristics of vertical tubes and inclined plates, focusing on film thickness and wave frequency. A numerical modelling approach was employed using OpenFOAM’s InterFOAM ...
  • Thermal and fluid dynamic optimization of a CPV-T receiver for solar co-generation applications: numerical modelling and experimental validation 

    Santos Serrano, Daniel; Azgin, Ahmet; Castro González, Jesús; Kizildag, Deniz; Rigola Serrano, Joaquim; Tunçel, Bilge; Turan, Rasit; Preßmair, Rupert; Felsberger, Richard; Buchroithne, Armin (Elsevier, 2023-07)
    Article
    Open Access
    Solar co-generation, i.e., the generation of electricity and heat in a single device by concentrating the sunbeams, has the potential to significantly increase the overall system performance. The main challenge is related ...
  • Exploiting spatial symmetries for solving Poisson's equation 

    Alsalti Baldellou, Àdel; Álvarez Farré, Xavier; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (Elsevier, 2023-08-01)
    Article
    Open Access
    This paper presents a strategy to accelerate virtually any Poisson solver by taking advantage of s spatial reflection symmetries. More precisely, we have proved the existence of an inexpensive block diagonalisation that ...
  • Two-phase turbulent kinetic energy budget computation in co-current Taylor bubble flow 

    Frederix, E.M.A.; Tajfirooz, S; Hopman, Johannes Arend; Fang, Jun; Merzari, Elia; Komen, E.M.J. (Taylor & Francis Group, 2023-02-13)
    Article
    Restricted access - publisher's policy
    Simulation of two-phase flows is relevant for reactor design and safety at normal operation or during accident scenarios. Often, the two-phase flow is in a regime in which slugs are formed or where the flow stratifies. ...
  • Numerical assessment of RANS and LES modelling in particle separation devices 

    Bahramian, Linda; Amani, Ahmad; Muela Castro, Jordi; Rigola Serrano, Joaquim; Oliet Casasayas, Carles; Pérez Segarra, Carlos David (European Conference for AeroSpace Sciences (EUCASS), 2022)
    Conference report
    Open Access
    In the present work, the separation efficiency analysis on particle-laden flows in the framework of LES and RANS modelling for an Inertial Particle Separator (IPS) device has been presented. The comparison of LES and RANS ...
  • Efficient strategies for solving the variable Poisson equation with large contrasts in the coefficients 

    Alsalti Baldellou, Àdel; Álvarez Farré, Xavier; Gorobets, Andrei; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (2022)
    Conference report
    Open Access
    Discrete versions of Poisson’s equation with large contrasts in the coefficients result in very ill-conditioned systems. Thus, its iterative solution represents a major challenge, for instance, in porous media and multiphase ...
  • On the effect of prandtl number to subgrid-scale heat flux models 

    Trias Miquel, Francesc Xavier; Santos Serrano, Daniel; Hopman, Johannes Arend; Gorobets, Andrei; Oliva Llena, Asensio (Scipedia, 2022)
    Conference report
    Open Access
    Estimations of the grid size and computational cost for direct numerical simulation (DNS) and large-eddy simulation (LES) of Rayleigh-Bénard convection (RBC) are presented in the {Ra, P r} phase space. Computational ...

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