Now showing items 1-20 of 28

  • An experimental study of ultrasonic vibration and the penetration of granular material 

    Firstbrook, David; Worrall, Kevin; Timoney, Ryan; Suñol Galofre, Francesc Xavier; Gao, Yang; Harkness, Patrick (2017-02-01)
    Article
    Open Access
    This work investigates the potential use of direct ultrasonic vibration as an aid to penetration of granular material. Compared with non-ultrasonic penetration, required forces have been observed to reduce by an order of ...
  • Assessment of the functional properties stability in (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 piezoceramics: huge dielectric and piezoelectric nonlinearity 

    Ochoa Guerrero, Diego A.; Reyes Montero, Armando; Suñol Galofre, Francesc Xavier; Villafuerte Castrejón, Maria Elena; Pardo, Lorena; García García, José Eduardo (2019-02-05)
    Article
    Restricted access - publisher's policy
    The (Ba,Ca)(Zr,Ti)O3 ceramic system has received special attention in recent years because it may lead to promising lead-free piezoceramics. However, the stability of the functional properties of these materials is an ...
  • Bouncing of bubbles impacting at a free surface 

    Suñol Galofre, Francesc Xavier; González Cinca, Ricardo (2009)
    Conference report
    Open Access
  • Bubble and droplet flow phenomena at different gravity levels 

    Suñol Galofre, Francesc Xavier (Universitat Politècnica de Catalunya, 2011-07-19)
    Doctoral thesis
    Open Access
    Two-phase flows are encountered in a wide range of applications both on-ground and in space. The dynamics of such flows in the absence of gravity is completely different from that in normal gravity due to the absence of ...
  • Bubbly jet impingement in different liquids 

    Suñol Galofre, Francesc Xavier; González Cinca, Ricardo (2010)
    Conference report
    Restricted access - author's decision
    An experimental setup for the study of bubbly jets collision in microgravity has been designed. On ground preliminary results are presented in order to be compared with those obtained in a near future in low gravity ...
  • Bubbly jet impingement in different liquids 

    Suñol Galofre, Francesc Xavier; González Cinca, Ricardo (2010-07-06)
    Article
    Restricted access - publisher's policy
    The impingement of bubbly jets in distilled water and ethanol has been experimentally studied on ground. An experimental apparatus for the study of jet impingement on ground and inmicrogravity has been designed. The ...
  • Design analysis of an experiment of bubble coalescence in microgravity 

    Suñol Galofre, Francesc Xavier; Pino, Ramón M.; Maldonado, O.; González Cinca, Ricardo (Universidad de Granada, 2007-03)
    Conference report
    Open Access
  • Design and characterization of immersion ultrasonic transducers for pulsed regime applications 

    Suñol Galofre, Francesc Xavier; Ochoa Guerrero, Diego A.; Suñé, Laura R.; García García, José Eduardo (2019)
    Article
    Open Access
    Ultrasonic transducer design is focused to maximize performance in specific applications, usually leading to a complex design and expensive construction and assembly. With the aim to overcome ...
  • Droplet collisions after liquid jet breakup in microgravity conditions 

    Suñol Galofre, Francesc Xavier; González Cinca, Ricardo (2011)
    Article
    Open Access
    The droplet dynamics and collisions after a liquid jet breakup have been experimentally studied in low gravity conditions. An experimental setup was designed in order to be used at the I.N.T.A. Drop Tower, which allows ...
  • Effects of gravity level on bubble detachment, rise, and bouncing with a free surface 

    Suñol Galofre, Francesc Xavier; González Cinca, Ricardo (2019-02-05)
    Article
    Open Access
    Bubble detachment, rise, and bouncing upon impact with a free surface is studied experimentally in variable gravity conditions. Previous investigations focused on the effects of fluid properties such as ...
  • Effects of gravity level on bubble formation and rise in low-viscosity liquids 

    Suñol Galofre, Francesc Xavier; González Cinca, Ricardo (2015-05-15)
    Article
    Open Access
    We present an experimental analysis of the effects of gravity level on the formation and rise dynamics of bubbles. Experiments were carried out with millimeter-diameter bubbles in the hypergravity environment provided by ...
  • Enhancement of piezoelectric properties stability of submicron-structured piezoceramics obtained by spark plasma sintering 

    Ochoa Guerrero, Diego A.; Suñol Galofre, Francesc Xavier; Rubio Marcos, Fernando; García García, José Eduardo (Elsevier, 2018-06-19)
    Article
    Restricted access - publisher's policy
    Grain-size effect on functional properties of piezoceramics is nowadays an important topic due to the potential applications of these materials at the submicron scale. In this context, we explore the effect of the grain ...
  • ESA - SYT 2011 - Final Report 

    Suñol Galofre, Francesc Xavier; Maldonado, Oscar; Vidal Arco, Eduardo; García, Anna; González Cinca, Ricardo (2011-12)
    External research report
    Restricted access - confidentiality agreement
    ESA - SYT 2011 - Final Report
  • Experimental analysis of bubble jets collision 

    Suñol Galofre, Francesc Xavier; González Cinca, Ricardo (2008)
    Conference report
    Open Access
  • Experimental analysis of bubble jets collision 

    Suñol Galofre, Francesc Xavier; González Cinca, Ricardo (Universite Libre de Bruxelles, 2008-09)
    Conference lecture
    Open Access
  • Experimental setup for the study of jet interactions 

    Suñol Galofre, Francesc Xavier; Pino, Ramón M.; Maldonado, Oscar; González Cinca, Ricardo (Japan Aerospace Exploration Agency, 2007-10)
    Conference report
    Open Access
  • Experimental setup for the study of jet interactions 

    Suñol Galofre, Francesc Xavier; Pino González, David; Maldonado, Oscar; González Cinca, Ricardo (2007)
    Conference lecture
    Open Access
    We present a new experimental setup for the study of bubble coalescence and bubble jet interactions in microgravity conditions [1].Test section consists of a cavity full of liquid containing two bubble injectors whose ...
  • Experimental setup for the study of the effects of vibrations on multiphase systems in suborbital flights 

    Arias Calderón, Santiago; Suñol Galofre, Francesc Xavier; González Cinca, Ricardo (2011)
    Conference report
    Open Access
    We present an experimental setup for the study of the effects of controlled harmonic vibrations applied on multiphase systems in microgravity. This setup was recently launched onboard an ESA/DLR/SNSB Mini-Texus rocket with ...
  • Experimental study of bubbles behaviour 

    Suñol Galofre, Francesc Xavier; Pino, Ramón M.; Maldonado, Oscar; González Cinca, Ricardo (European Low Gravity Research Association (ELGRA), 2007-09)
    Conference report
    Open Access
  • Experimental study of water droplet collisions in low gravity 

    Suñol Galofre, Francesc Xavier; González Cinca, Ricardo (2010)
    Conference report
    Open Access
    An experimental setup for the study of droplet collisions in a drop tower is presented.