Ara es mostren els items 21-35 de 35

    • Relative dynamics of quantum vortices and massive cores in binary BECs 

      Bellettini, Alice; Richaud, Andrea; Penna, Vittorio (2023-08-02)
      Article
      Accés obert
      We study the motion of superfluid vortices with filled massive cores. Previous point-vortex models already pointed out the impact of the core mass on the vortex dynamical properties, but relied on an assumption that is ...
    • Simulation of vortices induced by dielectric barrier discharge plasma actuator under burst-mode actuation 

      Fradera i Soler, Pau (Universitat Politècnica de Catalunya, 2020-07-20)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   University of California, Irvine
      The Dielectric Barrier Discharge (DBD) plasma actuator operating under duty-cycle actuation has been shown to provide with great flow control capabilities. As a consequence, there is a pressing need to understand the ...
    • Spectral/hp element stability analysis of classical and non-classical streamwise aligned vortices 

      Melé Casas, Josep (Universitat Politècnica de Catalunya / Imperial College London, 2013)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      Realitzat a/amb:   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 ...
    • Spinor-induced instability of kinks, holes and quantum droplets 

      Kartashov, Yaroslav V.; Lashkin, Volodymyr M.; Modugno, Michele; Torner Sabata, Lluís (2022-07)
      Article
      Accés obert
      We address the existence and stability of one-dimensional (1D) holes and kinks andtwo-dimensional (2D) vortex-holes nested in extended binary Bose mixtures, which emerge in thepresence of Lee–Huang–Yang (LHY) quantum ...
    • Spiraling vortices in exciton-polariton condensates 

      Ma, Xuekai; Kartashov, Yaroslav V.; Gao, Tingge; Torner Sabata, Lluís; Schumacher, Stefan (American Physical Society (APS), 2020-07-23)
      Article
      Accés obert
      We introduce the phenomenon of spiraling vortices in driven-dissipative (nonequilibrium) exciton-polariton condensates excited by a nonresonant pump beam. At suitable low pump intensities, these vortices are shown to spiral ...
    • Study for the numerical resolution of conservation equations of mass, momentum and energy to be applied to be applied on vortex 

      Vega Valeri, Albert (Universitat Politècnica de Catalunya, 2015-06)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      The main aim of this work is to be an introduction to the development of numerical codes for fluid dynamics and make them capable of represent real situations with academic purposes. Starting from a very basic point, the ...
    • Study of feature detection methods for aerodynamics 

      Ahrens Velásquez, Kevin (Universitat Politècnica de Catalunya, 2023-05-02)
      Projecte Final de Màster Oficial
      Accés obert
      The work presented throughout this file provides a study of the methods currently available for the identification of vortex within the fluid dynamics field. Particularly, this work presents a set of routines based on the ...
    • Study of the passive flow control mechanism applied to a generic (DrivAer) car 

      González Viera, Rubén (Universitat Politècnica de Catalunya, 2021-01-17)
      Treball Final de Grau
      Accés obert
      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: Study of cloud activity at the "Storm-Alley" region on Saturn 

      Simón Gil De Muro, Eduardo (Universitat Politècnica de Catalunya, 2022-07-18)
      Treball Final de Grau
      Accés obert
      The objective of this thesis is to obtain experimental energy spectra for potential vorticity of the storms and clouds in the "Storm Alley" region in Saturn by using images taken by Cassini’s ISS instrument. The brightness ...
    • 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
      Accés obert
      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
      Accés obert
      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)
      Text en actes de congrés
      Accés obert
      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 ...
    • Unidirectional guided resonances in anisotropic waveguides 

      Mukherjee, Samyobrata; Gomis Bresco, Jordi; Artigas García, David; Torner Sabata, Lluís (2021-05-15)
      Article
      Accés obert
      We show that anisotropic planar anti-guiding waveguide structures with two radiation channels toward the surrounding cladding materials can support unidirectional guided resonances (UGRs), where radiation is canceled in ...
    • Vortex rings impinging on permeable boundaries 

      Mujal Colilles, Anna; Dalziel, Stuart; Bateman Pinzón, Allen (2015-01)
      Article
      Accés obert
      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 ...
    • Wakes and instabilities of static and freely vibrating cylinders 

      Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Pastrana Maldonado, Daniel; Cajas García, Juan Carlos; Houzeaux, Guillaume (Springer, 2019)
      Text en actes de congrés
      Accés obert
      The flow around static and freely vibrating cylinders are of interest in understanding different phenomena encountered in many practical applications.