Ara es mostren els items 1-15 de 15

  • A dust cleaning system for solar arrays on Mars using pressurized CO2 

    Arias Montenegro, Francisco Javier (2018-11-15)
    Article
    Accés restringit per política de l'editorial
    Obtaining CO2 from the Martian atmosphere through a freezing process has been proposed during de last decade as a means of obtaining high-pressure gas without having to use mechanical and sorption pumps -which, besides ...
  • A new shoreline instability mechanism related to high-angle waves 

    Falqués Serra, Albert; Kakeh Burgada, Nabil; Calvete Manrique, Daniel (2017)
    Text en actes de congrés
    Accés obert
    A new shoreline instability triggered by high-angle waves and leading to sand wave formation is investigated. In contrast with the well-known high angle wave instability, which involves both the surf and shoaling zones and ...
  • Cone penetration tests in a virtual calibration chamber 

    Arroyo Alvarez de Toledo, Marcos; Butlanska, Joanna; Gens Solé, Antonio; Calvetti, Francesco; Jamiolkowski, Michael (2011)
    Article
    Accés restringit per política de l'editorial
    A virtual calibration chamber was built using a threedimensional model based on the discrete-element method. The chamber was then filled with a scaled granular equivalent of Ticino sand, the material properties of which ...
  • Effect of suction and plasticity on the shear strength of sand/silt mixtures 

    Villar, María Victoria; Martín, Pedro Luís; Gómez-Espina, Ramón; Lloret Morancho, Antonio (Taylor & Francis, 2010)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    This paper presents results of an experimental study on the effect of suction on the shear behaviour of sand/silt mixtures as determined with direct shear tests performed under suction control. The device used to perform ...
  • Effect of wave-bedform feedbacks on the formation of, and grain sorting over shoreface-connected sand ridges 

    Vis-Star, Nicolette C.; Swart, Huib E. de; Calvete Manrique, Daniel (2009-11)
    Article
    Accés restringit per política de l'editorial
    The influence of wave–bedform feedbacks on both the initial formation of shoreface-connected sand ridges (sfcr) and on grain size sorting over these ridges on micro-tidal inner shelves is studied. Also, the effect of ...
  • Estudio Microestructural del Rock Sanding 

    Garolera Vinent, Daniel (Universitat Politècnica de Catalunya, 2003-01-01)
    Tesina
    Accés obert
    Castellà: El estudio de la producción de arena (rock sanding) en pozos petrolíferos ha sido objeto importante de investigación durante los últimos años debido al auge de las nuevas técnicas de producción: perforación con ...
  • Fluid effects in sand production simulations coupling DEM with CFD 

    Climent Pera, Natalia; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; O'Sullivan, Catherine (CRC Press Taylor & Francis Group, 2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Sand production around a wellbore is here simulated using a three dimensional numerical model based on Discrete Element Method (DEM) coupled with Computational Fluid Dynamics (CFD). The model is calibrated against a ...
  • Gas migration in sand/bentonite mixtures through preferential paths 

    Arnedo Gaute, Diego; Alonso Pérez de Agreda, Eduardo; Olivella Pastallé, Sebastià; Romero Morales, Enrique Edgar (2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Sand/bentonite mixtures are considered as buffer material in low and medium radioactive waste disposal schemes. While the bentonite provides low permeability and swelling capacity, the sand is intended to improve mechanical ...
  • Magnetic Mars dust removal technology: a dustblasting technique for Mars 

    Arias Montenegro, Francisco Javier (2018-01)
    Article
    Accés restringit per política de l'editorial
    It is known that the Martian atmosphere contains a large amount of suspended dust. The saltation process, or gravitational settlement of atmospheric dust, onto the surface of solar arrays can affect the utility of solar ...
  • Mechanical and basic deformation properties of mortar with recycled glass as a fine aggregate replacement 

    Cabrera Covarrubias, Francisca Guadalupe; Gómez Soberón, José Manuel Vicente; Almaral Sánchez, Jorge Luis; Arredondo Rea, Susana Paola; Mendivil Escalante, José Miguel (Springer, 2018)
    Article
    Accés restringit per decisió de l'autor
    As a result of the large quantities of glass residues being generated, research is currently underway for efficient, economic and eco-friendly alternatives, among them the incorporation of recycled glass in mortar as a ...
  • Onshore sandbar migration in the surf zone: new insights into the wave-induced sediment transport mechanisms 

    Fernández Mora, María de los Ángeles; Calvete Manrique, Daniel; Falqués Serra, Albert; de Swart, Huib E. (2015-04-28)
    Article
    Accés obert
    We present a novel process-based morphodynamic model, which includes transport processes due to both velocity and acceleration skewness and a new formulation for intrawave motions, that successfully simulates observations ...
  • Preliminary Studies on Metal Adsorption by Waste Foundry Sand 

    Afonso, Ana (Universitat Politècnica de Catalunya, 2011-07-15)
    Projecte Final de Màster Oficial
    Accés obert
    In the casting industries, sand is typically reused through the production cycles. Since sand for itself do not have the necessary properties to this process, it’s necessary to introduce binders to force the sand grains ...
  • Propostes d'actuació a la riera de Banyeres del Penedès 

    Cobos Climent, Aitor (Universitat Politècnica de Catalunya, 2015-05-28)
    Treball Final de Grau
    Accés obert
    The Riera de Sant Miquel passing through the town of Banyeres de Penedès of arouses interest, but it is necessary to find solutions in order to increase biodiversity and continue to generate new services ecosystem by ...
  • Unexpected behaviour of a large excavation in saturated sands 

    Alonso Pérez de Agreda, Eduardo; Gens Solé, Antonio; Alcoverro Bassols, Jordi; Ortuño, L (IOS Press, 2007)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The paper describes the behaviour of the perimeter wall of a very large excavation in saturated sands. The excavation was extended to a depth of 20m (17m below the water table) and the walls reached an impervious silty ...
  • Virtual Calibration Chamber CPT on Ticino sand 

    Butlanska, Joanna; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (2010)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The following paper surnmarizes results of CPT's performed in virtual calibration chamber (VCC) built with a 3D model based on the distinct element method (DEM). A discrete material tailored to mimic Ticino sand is tested ...