Now showing items 1-18 of 18

  • Coherent structures in oscillatory flows within the laminar-to-turbulent transition regime for smooth and rough walls 

    Mujal Colilles, Anna; Christensen, Kenneth T.; Bateman Pinzón, Allen; Garcia, Marcelo Horacio (2016-04)
    Article
    Open Access
    We investigate coherent structures present in oscillatory boundary layers over smooth and rough beds for Reynolds numbers between 103 and 104, in the transition to turbulence regime. A two-camera 2D- particle image velocimetry ...
  • Erosion caused by propeller jets in a low energy harbour basin 

    Mujal Colilles, Anna; Gironella Cobos, Xavier; Sánchez-Arcilla Conejo, Agustín; Puig i Polo, Càrol; García León, Manuel (2017-01)
    Article
    Open Access
    Field data of a harbour basin are compared with analytical formulations for predicting maximum scouring depth due to propeller jets. Spatial data analysis of seven-year biannual bathymetries quantifies the evolution of the ...
  • Estudi experimental de l'eficiència de la mescla en dipòsits d'abastament d'aigua 

    Mujal Colilles, Anna (Universitat Politècnica de Catalunya, 2008-01-22)
    Minor thesis
    Open Access
    El fenomeno de la mezcla en depósitos de abastecimiento de aguas tiene un efecto directo en la calidad del agua saliente. La creación de zonas de mezcla pobre y la estratificación pueden tener efectos negativos en la ...
  • Hybrid tool to prevent ship propeller erosion 

    Llull Marroig, Antoni Ignaci; Mujal Colilles, Anna; Castells Sanabra, Marcel·la; Gironella Cobos, Xavier; Martínez de Osés, Francesc Xavier; Martín Mallofré, Agustí; Sánchez-Arcilla Conejo, Agustín (American Society of Mechanical Engineers (ASME), 2018)
    Conference report
    Open Access
    The present contribution aims to implement a new methodology to prevent Roll on-Roll off vessels (RO-RO) from causing severe scouring actions. The methodology combines field, experimental, theoretical and numerical tools ...
  • Low energy transverse sand bars at el Trabucador beach, Ebro delta: a preliminary study 

    Mujal Colilles, Anna; Grifoll Colls, Manel; Falqués Serra, Albert (2017)
    Conference report
    Open Access
    The complex rhythmic morphology of the inner side of the Trabucador barrier beach is investigated. This system fea-tures transverse bars along with shoreline undulations. From visual inspection, the typical spacing between ...
  • PIV applications in vortex rings and oscillatory boundary layers 

    Mujal Colilles, Anna (Universitat Politècnica de Catalunya, 2013-05-13)
    Doctoral thesis
    Open Access
    Particle Image Velocimetry (PIV) is one of the most used experimental techniques in fluid mechanics to obtain the velocity field of a flow. One of its most celebrated characteristics is that it does not have interference ...
  • Rhythmic morphology in a microtidal low-energy beach 

    Mujal Colilles, Anna; Grifoll Colls, Manel; Falqués Serra, Albert (2019-06)
    Article
    Restricted access - publisher's policy
    Observations of rythmic features along the inner side of the Trabucador barrier beach are coupled to two numerical models to unravel the mechanisms of its formation. The Trabucador is a long (6 Km) narrow (125 m) barrier ...
  • Scouring processes in harbour basins during the docking and undocking manoeuvring: laboratory experiments 

    Mujal Colilles, Anna; Gironella Cobos, Xavier; Sánchez-Arcilla Conejo, Agustín (Iniciativa Digital Politècnica, 2016)
    Conference report
    Open Access
  • Scouring processes in harbour basins during the docking and undocking manoeuvring: laboratory experiments 

    Mujal Colilles, Anna; Gironella Cobos, Xavier; Sánchez-Arcilla Conejo, Agustín (Universidad de Cantabria, 2017-07-25)
    Article
    Open Access
  • Ship manoeuvre analysis and simulation to obtain scouring related propeller variables 

    Llull Marroig, Antoni Ignaci; Mujal Colilles, Anna; Gironella Cobos, Xavier; Castells Sanabra, Marcel·la; Martínez de Osés, Francesc Xavier; Martín Mallofré, Agustí; Sánchez-Arcilla Conejo, Agustín (International Centre for Numerical Methods in Engineering (CIMNE), 2018)
    Conference lecture
    Open Access
    The evolution of shipping industry in terms of bigger and more powerful ships, is causing several issues in existing ports and marinas designed, initially, to host smaller vessels with smaller propulsion systems and lower ...
  • Ship manoeuvre patterns to prevent propeller scouring effects 

    Castells Sanabra, Marcel·la; Mujal Colilles, Anna; Llull Marroig, Antoni Ignaci; Gironella Cobos, Xavier; Martínez de Osés, Francesc Xavier; Martín Mallofré, Agustí; Sánchez-Arcilla Conejo, Agustín (World Association for Waterborne Transport Infrastructure (PIANC), 2018)
    Conference report
    Open Access
  • Ship manoeuvring effects on propeller induced erosion 

    Mujal Colilles, Anna; Llull Marroig, Antoni Ignaci; Castells Sanabra, Marcel·la; Gironella Cobos, Xavier; Martínez de Osés, Francesc Xavier; Sánchez-Arcilla Conejo, Agustín (2018)
    Conference report
    Restricted access - publisher's policy
    The shipping industry evolution over the last decades has led to growing structural and operational problems, in particular, for old marinas with lower depths to hosts present ships and with higher drafts and power of ...
  • Stern twin-propeller effects on harbor infrastructures. Experimental analysis 

    Mujal Colilles, Anna; Castells Sanabra, Marcel·la; Llull Marroig, Antoni Ignaci; Gironella Cobos, Xavier; Martínez de Osés, Francesc Xavier (2018-11-02)
    Article
    Open Access
    The growth of marine traffic in harbors, and the subsequent increase in vessel and propulsion system sizes, produces three linked problems at the harbor basin area: (i) higher erosion rates damaging docking structures; ...
  • Study of the bed velocity induced by twin propellers 

    Mujal Colilles, Anna; Gironella Cobos, Xavier; Cabrera Crespo, Alejandro Jacobo; Sánchez-Arcilla Conejo, Agustín (2017-09)
    Article
    Open Access
    Twin propellers without a rudder were studied using a physical model with a fixed clearance distance and three different rotating velocities. Experimental results were compared with results from theoretical expressions ...
  • Study of the efflux velocity induced by two propellers 

    Mujal Colilles, Anna; Gironella Cobos, Xavier; Jaquet, A.; Gómez Gesteira, Moncho; Sánchez-Arcilla Conejo, Agustín (EdiBios, 2015)
    Conference report
    Open Access
    Present analysis is related with seabed erosion caused during docking and undocking maneuvering. Twin propellers without rudder were studied using a physical model with a fixed clearance distance and three different rotating ...
  • The MARHIS network: an application to composite modelling for overtopping 

    Sánchez-Arcilla Conejo, Agustín; López Lara, Javier; Marzeddu, Andrea; Alvarez, Alvaro; Gironella Cobos, Xavier; Mujal Colilles, Anna; Losada, Iñigo (2018)
    Conference report
    Restricted access - publisher's policy
    This paper presents the MARHIS network, an added value aggregation of hydraulic facilities and numerical modelling tools plus field equipment from the Catalonia University of Technology and IH Cantabria. The paper presents ...
  • Tools for evaluation quay toe scouring induced by vessel propellers in harbour basins during the docking and undocking manoeuvring 

    Castells Sanabra, Marcel·la; Martínez de Osés, Francesc Xavier; Martín Mallofré, Agustí; Mujal Colilles, Anna; Gironella Cobos, Xavier (CRC Press, 2017)
    Conference report
    Open Access
    The evolution of the shipping industry (increased capacity and size of ships, power and self-propulsion), the increased productivity and rearrangement of spaces (port calls increased in number and frequency, changes in use ...
  • Vortex rings impinging on permeable boundaries 

    Mujal Colilles, Anna; Dalziel, Stuart; Bateman Pinzón, Allen (2015-01)
    Article
    Open Access
    Experiments with vortex rings impinging permeable and solid boundaries are presented in order to investigate the influence of permeability. Utilizing Particle Image Velocimetry, we compared the behaviour of a vortex ring ...