Exploració per tema "Sorra"

Ara es mostren els items 1-20 de 26

    • 8.18 - Rhythmic Coastal Landforms 

      Giovanni, Coco; Calvete Manrique, Daniel; Bryan, K.R.; Murray, A.B. (Elsevier, 2022)
      Capítol de llibre
      Accés restringit per política de l'editorial
      Coastal landforms can sometimes result in unique and visually mesmerizing spatially-organized patterns. Different spatial patterns develop over scales ranging from centimeters to tens of kilometers, and are observed at the ...

    • 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 ...

    • A coupled CFD-DEM model for sand production in oil wells 

      Climent Pera, Natalia (Universitat Politècnica de Catalunya, 2016-10-17)
      Tesi
      Accés obert
      During the oil recovery a hole is drilled, the sandstone is left unsupported next to the cavity and disloged sand grains can enter the oil recovery system. This process is called sand production and several problems may ...

    • Dispositiu recollidor de microplàstics i mesoplàstics per a zones de difícil accés 

      Colom Antolinos, Marc; Marco Cama, Sandra (Universitat Politècnica de Catalunya, 2022-07-14)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat
      Darrerament, els plàstics s’han expandit arreu del món, tot invadint ecosistemes on inlfueixen negativament en la fauna i flora que hi habita. Amb l’erosió i el pas del temps, dels plàstics més grans, se’n deriven d’altres ...

    • Disseny conceptual d'un sistema autònom per a facilitar la mobilitat en un context de platja per a persones amb mobilitat reduïda 

      Polo García-Patos, Raquel (Universitat Politècnica de Catalunya, 2023-07-07)
      Treball Final de Grau
      Accés obert
      Les persones amb mobilitat reduïda (PMR) són aquelles que pateixen una limitació funcional de les extremitats inferiors que afecta a les seves capacitats per al moviment, a efectes de desplaçar-se amb normalitat i autonomia ...

    • 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 ...

    • Experimental study of the corona performance of aged sand-cast substation connectors 

      Riba Ruiz, Jordi-Roger; Bogarra Rodríguez, Santiago; Gómez Pau, Álvaro; Moreno Eguilaz, Juan Manuel (2020-06-01)
      Article
      Accés obert
      Substation connectors, like many other high-voltage products, are tested once manufactured. However, the corona behavior of aged specimens can differ from that exhibited by newer ones, thus generating detrimental technical ...

    • 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 ...

    • Grading evolution and critical state in a discrete numerical model of Fontainebleau sand 

      Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; O'Sullivan, Catherine; Gens Solé, Antonio; Liu, T. (Thomas Telford, 2019-01)
      Article
      Accés obert
      Granular materials reach critical states upon shearing. The position and shape of a critical state line (CSL) in the compression plane are important for constitutive models, interpretation of in situ tests and liquefaction ...

    • Long-term morphodynamics of a coupled shelf-shoreline system forced by waves and tides, a model approach 

      Nnafie, Abdel; de Swart, Huib E.; Falqués Serra, Albert; Calvete Manrique, Daniel (American Geophysical Union (AGU), 2021-12)
      Article
      Accés obert
      Sand ridges, with length scales of several km, are prominent features of the seafloor landscape of many sandy continental shelves. Knowledge about the extent to which these ridges influence the large-scale (i.e., decadal ...

    • 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 ...

    • Màquina per a la recollida de microplàstics a les platges 

      Juan Esteo, Alejandro (Universitat Politècnica de Catalunya, 2020-02-05)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      [CATALÀ] La finalitat fonamental d’aquest projecte ha sigut desenvolupar un màquina per la recollida de microplàstics a les platges. La majoria de maquinària per a la neteja de platges elimina tot tipus de residus (taps, ...

    • 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 ...