Enviaments recents

  • Gravitomagnetic separation of bipolar charged martian dust 

    Arias Montenegro, Francisco Javier (2017)
    Comunicació de congrés
    Accés obert
    The possible role of magnetic anomalies on Mars in gravitational enhancement of separation of charged dust is considered. It is known that charges become spatially separated by differential transport and gravitational ...
  • Failure investigation of a Pelton turbine runner 

    Egusquiza Montagut, Mònica; Egusquiza Estévez, Eduard; Valentín Ruiz, David; Valero Ferrando, Ma. del Carmen; Presas Batlló, Alexandre (Elsevier, 2017-11)
    Article
    Accés restringit per política de l'editorial
    In this paper, an uncommon failure of a Pelton turbine has been analyzed. After the monitoring system detected a sudden increase in the vibration levels, the turbine was inspected. The inspection showed that a fragment of ...
  • Pressure-drop coefficients for cushioning system of hydraulic cylinder with grooved piston: a computational fluid dynamic simulation 

    Castilla López, Roberto; Alemany, Ignasi; Algar, Antonio; Gámez Montero, Pedro Javier; Roquet, Pedro; Codina Macià, Esteban (2017-10-25)
    Article
    Accés obert
    Cushioning is an important aspect in hydraulic cylinder performance. The piston has to be decelerated before it strikes the end cap in order to avoid stresses in the cylinder components and reduce vibration that can be ...
  • Magnet-sleeve-sealed mini trochoidal-gear pump prototype with polymer composite gear 

    Gámez Montero, Pedro Javier; Antoniak, Piotr; Castilla López, Roberto; Freire Venegas, Francisco Javier; Krawczyk, Justyna; Stryczek, Jaroslaw; Codina Macià, Esteban (2017-09-21)
    Article
    Accés obert
    The trochoidal-gear technology has been growing in groundbreaking fields. Forthcoming applications are demanding to this technology a step forward in the conceiving stage of positive displacement machines. The compendium ...
  • A negative reactivity feedback driven by induced buoyancy after a temperature transient in lead-cooled fast reactors 

    Arias Montenegro, Francisco Javier (2017-10-24)
    Article
    Accés restringit per política de l'editorial
    Consideration is given to the possibility to use changes in buoyancy as a negative reactivity feedback mechanism during temperature transients in heavy liquid metal fast reactors (HLMFRs). It is shown that by the proper ...
  • Deliberate salinization of seawater for desalination of seawater 

    Arias Montenegro, Francisco Javier (2017-09-15)
    Article
    Accés restringit per política de l'editorial
    The basis of a novel method for seawater desalination is outlined. In this work, pressure-retarded osmosis (PRO) energy is obtained and used posteriorly for the reverse osmosis (RO) process for seawater desalination. ...
  • Computational fluid dynamics modeling of impinging gas-jet systems: II. Application to an industrial cooling system device 

    Coussirat Núñez, Miguel Gustavo; van Beeck, J; Mestres Ridge, Marc; Egusquiza Estévez, Eduard; Buchlin, J-M; Valero Ferrando, Ma. del Carmen (2005-07-15)
    Article
    Accés restringit per política de l'editorial
    A numerical analysis of the flow behavior in industrial cooling systems based on arrays of impinging jets has been performed, using several eddy viscosity models to determine their modeling capabilities. For the cooling ...
  • Computational fluid dynamics modeling of impinging gas-jet systems: I. Assessment of eddy viscosity models 

    Coussirat Núñez, Miguel Gustavo; van Beeck, J; Mestres Ridge, Marc; Egusquiza Estévez, Eduard; Buchlin, J-M; Escaler Puigoriol, Francesc Xavier (2005-07-15)
    Article
    Accés restringit per política de l'editorial
    Computational fluid dynamics plays an important role in engineering design. To gain insight into solving problems involving complex industrial flows, such as impinging gas-jet systems (IJS), an evaluation of several eddy ...
  • The response of an elastic membrane to an external flow as drag enhancement technique 

    Arias Montenegro, Francisco Javier; Heras Jiménez, Salvador Augusto de las (American Institute of Aeronautics and Astronautics (AIAA), 2017)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The response of an elastic membrane to an external flow and its significance with regard to aerodynamic drag enhancement technique is discussed. It is shown that because the response of an elastic membrane to an external ...
  • The flow over a high-viscosity fluid layer as a drag enhancement technique 

    Arias Montenegro, Francisco Javier; Heras Jiménez, Salvador Augusto de las (American Institute of Aeronautics and Astronautics (AIAA), 2017)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    It is well known that hydrodynamic drag reduction can be obtained by locally surround-ing an immersed solid boundary with another low viscosity-fluid resulting in a lubricating effect. In aerodynamics propulsion, this ...

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