Recent Submissions

  • On Preconditioning Variable Poisson Equation with Extreme Contrasts in the Coefficients 

    Alsalti Baldellou, Àdel; Trias Miquel, Francesc Xavier; Gorobets, Andrey; Oliva Llena, Asensio (International Centre for Numerical Methods in Engineering (CIMNE), 2021)
    Conference report
    Open Access
    It is well known that the solution by means of iterative methods of very ill-conditioned systems leads to very poor convergence rates. In this context, preconditioning becomes crucial in order to modify the spectrum of the ...
  • Simulation of fluid-structure interaction and impact force on a reed valve 

    Castrillo Green, Pablo; Schillaci, Eugenio; Rigola Serrano, Joaquim (2021)
    Conference report
    Open Access
    The cyclic impact force between a reed valve and the seat plate is the main reason of the valve failure in many thermo-technical devices as compressors, engines, etc. According to experimental observations the latter is ...
  • Experimental and numerical analysis of reed valve movement in an impact fatigue test system and reciprocating compressors 

    Tofique, Muhammad Waqas; Löf, Alexander; Schillaci, Eugenio; Castrillo Green, Pablo; Rigola Serrano, Joaquim (Purdue University, 2021)
    Conference report
    Restricted access - publisher's policy
    During operation of a reciprocating compressor, its flapper valve opens to allow the passage of gases and closes by striking against the valve impact plate. This reed valve movement and impact is repeated billions of times. ...
  • Power electronics high performance air-cooled heat sinks integrating graphite based materials 

    Oliet Casasayas, Carles; Mullen, David; Hoell, Klaus; Cochrane, Nathan; Preishuber-Pfluegl, Florian; Rigola Serrano, Joaquim; Bouton, Mathieu; Pontrucher, Marc; Castrillo Green, Pablo; Santos Serrano, Daniel; Schillaci, Eugenio; McKay, Connor; Halimic, Elvedin; Freismuth, Juergen (Purdue University, 2021)
    Conference report
    Restricted access - publisher's policy
    The thermal management of the power electronics cooling in the aircraft is getting more attention in the recent years due to the progressive implementation of electrical systems, especially in the framework of the more ...
  • Subgrid-Scale Model Based on the Invariants of the Gradient Model Tensor 

    Folch Flórez, David; Trias Miquel, Francesc Xavier; Gorobets, A.; Oliva Llena, Asensio (2021)
    Conference report
    Open Access
    The incompressible Navier-Stokes equations stand as the best mathematical model for turbulent flows. However, direct numerical simulations at high Reynolds numbers are not yet feasible because the convective term produces ...
  • Numerical Analysis of Viscoelastic Fluid Injection Processes 

    Amani, Ahmad; Schillaci, Eugenio; Kizildag, Deniz; Pérez Segarra, Carlos David
    Conference report
    Open Access
    In this work, a numerical framework aimed at simulating high-viscous and viscoelastic liquid injection processes is presented. The study of fluid injection with viscoelastic properties, such as synthetic polymers, is of ...
  • Dynamic simulations of an absorption system with different working pairs at chiller and heat pump application 

    Zheng, Jian; Castro González, Jesús; Oliet Casasayas, Carles (Purdue University, 2021)
    Conference report
    Restricted access - publisher's policy
    This work describes the dynamic simulation of a direct air-cooled single effect solar-driven absorption system and demonstrates the numerical results of the absorption system with different working pairs. The working pairs ...
  • Experimental Analysis of a Draft Beer Ice Bank Machine 

    Torras, Santiago; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David (Purdue University, 2021)
    Conference report
    Restricted access - publisher's policy
    In a long-term established application as draft beer cooling and servicing machines, seems difficult to see any research application at first sight. However, this perspective change when one considers that the costs ...
  • Preliminary assessment of a polygeneration system based on a concentrated photovoltaic thermal (CPVT) solar collectors 

    Castro González, Jesús; Rigola Serrano, Joaquim; Kizildag, Deniz; Oliet Casasayas, Carles (Technishe Universität Berlin, 2021)
    Conference report
    Open Access
    ECOSun project has as main objective a cost reduction of electricity and heat co-generation via a Concentrated Photovoltaic/Thermal (CPV-T) system by applying low-cost materials and advanced industrial manufacturing methods. ...
  • Surface tension and contact angle measurement of LiBr and Carrol solution 

    Zheng, Jian; Castro González, Jesús; Oliet Casasayas, Carles; Oliva Llena, Asensio (Technishe Universität Berlin, 2021)
    Conference report
    Open Access
    The surface tension and contact angle play a relevant role in the heat and mass transfer for the absorption system working pairs. However, LiBr aqueous solution surface tension/contact angle studies are limited and for ...
  • 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 ...

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