Now showing items 1-18 of 18

    • Airplane vortices evolution near ground 

      Duro, Josep M; Bergadà Granyó, Josep Maria (Multidisciplinary Digital Publishing Institute, 2021-01-05)
      Article
      Open Access
      Airport traffic around the world has sharply increased over the years; as a result, airports need to be enlarged and the landing or taking off times between two consecutive airplanes must be reduced. To precisely determine ...
    • Effects of En-route Wake Vortex on RPAS Operations 

      Pérez Batlle, Marcos; Marcos, Mònica; Pastor Llorens, Enric (2016)
      Conference report
      Open Access
      Compared with common airliners, High/Medium Altitude Long Endurance (HALE/MALE) RPAS are lighter and have larger wingspan. Therefore RPAS will be extremely sensitive to vortex interactions with larger airliners, not ...
    • Estudio de la calle de von Kármán en un cilindro mediante PIV 

      Sibera Quilez, Gemma (Universitat Politècnica de Catalunya, 2013-09)
      Master thesis (pre-Bologna period)
      Open Access
      Estudio del caso bidimensional de un cilindro inmerso en una corriente uniforme mediante la técnica experimental de medición y caracterización de flujos PIV con el propósito de obtener una visualización precisa de la ...
    • Estudio para el desarrollo y aplicación de técnicas de vorticidad a problemas de separación de flujo en perfiles 

      Somoza Pérez, Gonzalo (Universitat Politècnica de Catalunya, 2016-01-20)
      Bachelor thesis
      Open Access
      En el presente trabajo se desarrolla un modelo basado en los denominados “vortex methods” para su aplicación a problemas bidimensionales (perfiles alares) que impliquen separación de flujo. Ello permite superar las ...
    • Implementación de un correlador 2D para el cálculo automático de velocidades de nubes en imágenes planetarias 

      Torre Pernas, Sabela de la (Universitat Politècnica de Catalunya, 2011-01-24)
      Master thesis (pre-Bologna period)
      Open Access
      Implementación de una aplicación que, a partir de dos imágenes de la superfície de un planeta gigante (Júpiter, Saturno, Neptuno, Urano) separadas por cierto intervalo de tiempo, calcula automáticamente el desplazamiento ...
    • Low-frequency unsteadiness in the vortex formation region of a circular cylinder 

      Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Borrell Pol, Ricard; Oliva Llena, Asensio (2013-08-23)
      Article
      Open Access
      The presence of low-frequency fluctuations in the wake of bluff bodies have been observed in several investigations. Even though the flow past a circular cylinder at Re = 3900 (Re = U ref D/ν) has been the object of several ...
    • Numerical study of flow past circular cylinder in sub-critial range 

      Manresa Pérez, Francesc (Universitat Politècnica de Catalunya, 2014-02)
      Master thesis (pre-Bologna period)
      Open Access
      The present work discusses the validity of the 2D circular cylinder problem in sub-critical range solved with URANS approach. Fluent is used as the numerical software and results are compared in the context of previous ...
    • Preliminary study of the effects of vortex generators in ultralight aircraft 

      López Calle, Oriol (Universitat Politècnica de Catalunya, 2015-06)
      Bachelor thesis
      Open Access
      - Theoretical study and state of the art of use of these devices. - Flow simulation across a given lifting surface with and without VGs. - Analysis of vortex generator’s performance in different configurations for given ...
    • Roadmap on structured light 

      Rubinsztein-Dunlop, Halina; Forbes, Andrew; Berry, M. V.; Rosales Guzmán, Carmelo; Belmonte Molina, Aniceto; Pérez Torres, Juan (Institute of Physics (IOP), 2017)
      Article
      Open Access
      Structured light refers to the generation and application of custom light fields. As the tools and technology to create and detect structured light have evolved, steadily the applications have begun to emerge. This roadmap ...
    • Sensitivity analysis of maximum circulation of wake vortex encountered by en-route aircraft 

      Rojas Gregorio, José Ignacio; Melgosa Farrés, Marc; Prats Menéndez, Xavier (Multidisciplinary Digital Publishing Institute (MDPI), 2021-07-16)
      Article
      Open Access
      Wake vortex encounters (WVE) can pose significant hazard for en-route aircraft. We studied the sensitivity of wake vortex (WV) circulation and decay to aircraft mass, altitude, velocity, density, time of catastrophic wake ...
    • Spectral/hp element stability analysis of classical and non-classical streamwise aligned vortices 

      Melé Casas, Josep (Universitat Politècnica de Catalunya / Imperial College London, 2013)
      Bachelor thesis
      Restricted access - author's decision
      Covenantee:   Imperial College of London
      The goal of this thesis is to study the stability of a vortex, which has been called the m-Shape vortex, that takes place in some Formula 1 cars. This vortex has been obtained from Computational Fluid Dynamics data. It ...
    • Study of the passive flow control mechanism applied to a generic (DrivAer) car 

      González Viera, Rubén (Universitat Politècnica de Catalunya, 2021-01-17)
      Bachelor thesis
      Open Access
      From this last ten years on, the last trend of the automotive industry has been to produce daily driver cars as efficient as possible. This decision has permitted aerodynamic performance to be one of the most important ...
    • Study: Numerical simulations of synthetic jets 

      Martínez Segarra, Carlos (Universitat Politècnica de Catalunya, 2020-06)
      Bachelor thesis
      Open Access
      A synthetic jet is formed by the oscillating movement of a membrane located inside a cavity. Such movement allows ambient fluid to be dragged inside and outside, hence producing a jet that is able to transfer both linear ...
    • Superfluid vortex dynamics on a torus and other toroidal surfaces of revolution 

      Guenther, Nils Eric; Massignan, Pietro Alberto; Fetter, Alexander L. (American Physical Society (APS), 2020-05-04)
      Article
      Open Access
      The superfluid flow velocity is proportional to the gradient of the phase of the superfluid order parameter, leading to the quantization of circulation around a vortex core. In this work, we study the dynamics of a ...
    • Superfluid vortex dynamics on planar sectors and cones 

      Massignan, Pietro Alberto; Fetter, Alexander L. (American Physical Society (APS), 2019-06-07)
      Article
      Open Access
      We study the dynamics of vortices formed in a superfluid film adsorbed on the curved two-dimensional surface of a cone. To this aim, we observe that a cone can be unrolled to a sector on a plane with periodic boundary ...
    • The role of vorticity in maximal swimming propulsion 

      Redondo Apraiz, José Manuel; Arellano, Raul; Carrillo Cortés, José Alejandro; Terrés Nicoli, José María (Institute of Thermomechanics, Academy of Sciences of the Czech Republic, 2013)
      Conference report
      Open Access
      Experimental and theoretical results on the propulsion of swimrners are presented with an emphasis on the specific characteristics of the wakes produced by the swimmers in the water. We introduce the subject revising ...
    • Understanding the influence of wake cavitation on the dynamic response of hydraulic profiles under lock-in conditions 

      Roig Bauzà, Rafel; Chen, Jian; Torre Rodríguez, Óscar de la; Escaler Puigoriol, Francesc Xavier (2021-09-22)
      Article
      Open Access
      To accelerate the integration of fluctuating renewable energy technologies in the power systems, it is necessary to increase the flexibility of hydropower by operating turbines at off-design conditions. Unfortunately, this ...
    • 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 ...