Now showing items 21-40 of 128

    • Controlling entrainment in the smoke cloud using level set-based front tracking 

      Dietze, Eckhard; Schmidt, Heiko; Stevens, Bjorn; Mellado González, Juan Pedro (2015-01-13)
      Article
      Open Access
      Although large-eddy simulation (LES) has been shown to produce a reasonable representation of the turbulent circulations within the stratocumulus-topped boundary layer, it has difficulties to accurately predict ...
    • Coupling strategies for solving the RANS equations 

      Suárez Martínez, Guillermo (Universitat Politècnica de Catalunya, 2020-02-14)
      Master thesis
      Open Access
      Covenantee:   Deutsches Zentrum für Luft-und Raumfahrt
      For the present work two implicit methods of coupling the compressible Reynolds Averaged Navier-Stokes equations in conjunction with the one equation Spalart-Allmaras turbulence model have been developed. The first approach, ...
    • Data-driven dimensional analysis of heat transfer in irradiated particle-laden turbulent flow 

      Jofre Cruanyes, Lluís (2020)
      Article
      Restricted access - publisher's policy
      The study of thermal radiation interacting with particle-laden turbulence is of great importance in a wide range of scientific and engineering applications. The fundamental and applied study of such systems is challenging ...
    • Description of the test cases 

      Bugeda Castelltort, Gabriel; Periaux, Jacques Francis; Qin, Ning; Pons Prats, Jordi (Springer, 2020)
      Part of book or chapter of book
      Restricted access - publisher's policy
      The high-level objective of MARS project was to understand the formation and behaviour of turbulent structures which affects the Reynolds stress and skin friction. The aim was, once understood, to apply flow control ...
    • Detached-eddy simulation of a wall-mounted cylinder flow 

      Contel Anguix, Alejandro (Universitat Politècnica de Catalunya, 2016-09-14)
      Bachelor thesis
      Open Access
      Covenantee:   Technische Universität München
      The aim of this project is to study the effect of different turbulence models on the detachment point on the cylinder surface and the vortex shedding frequencies. The turbulence models considered are Spallart-Allmaras DDES, ...
    • Detailed numerical study of turbulent flows in air curtains 

      Jaramillo Ibarra, Julian Ernesto; Pérez Segarra, Carlos David; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio (2010)
      Conference lecture
      Restricted access - publisher's policy
      Air curtains are generally a set of vertical or horizontal plane jets used as ambient separator. In order to prevent entrainment, a good air curtain should provide a jet with low turbulence level, enough momentum to ...
    • Dimension reduction of thermo-fluid mechanisms in irradiated particle-laden turbulence 

      Jofre Cruanyes, Lluís (2019)
      External research report
      Open Access
    • Direct numerical simulation of a fully developed turbulent square duct flow up to Re-tau=1200 

      Zhang, Hao; Trias Miquel, Francesc Xavier; Gorobets, Andrey; Tan, Yuanqiang; Oliva Llena, Asensio (2015-08-01)
      Article
      Open Access
      Various fundamental studies based on a turbulent duct flow have gained popularity including heat transfer, magnetohydrodynamics as well as particle-laden transportation. An accurate prediction on the turbulent flow field ...
    • Direct numerical simulation of a NACA0012 in full stall 

      Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Oliva Llena, Asensio (2013-10-15)
      Article
      Open Access
      This work aims at investigating the mechanisms of separation and the transition to turbulence in the separated shear-layer of aerodynamic profiles, while at the same time to gain insight into coherent structures formed ...
    • Direct numerical simulation of the flow over a spherical bubble in a turbulent pipe flow 

      Jofre Cruanyes, Lluís; Balcázar Arciniega, Néstor; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Castro González, Jesús (International Association for Computational Mechanics (IACM), 2014)
      Conference report
      Restricted access - publisher's policy
      This work aims at investigating, by means of a direct numerical simulation, the flow over a clean spherical bubble fixed on the axis of a turbulent pipe flow. The simulation is performed by means of a parallel unstructured ...
    • Direct numerical simulation of viscoplastic-type non-Newtonian fluid flows in stenosed arteries 

      Carmona Muñoz, Ángel; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2013)
      Conference report
      Restricted access - publisher's policy
      The aim of this work is to provide DNS solutions for turbulence flows of viscoplastic-type non-Newtonian fluids and thus contribute to gain insight into the underlying physics of the non-Newtonian turbulent flows. This ...
    • Eigensensitivity analysis of subgrid-scale stresses in large-eddy simulation of a turbulent axisymmetric jet 

      Jofre Cruanyes, Lluís (2019)
      Article
      Open Access
      The study of complex turbulent flows by means of large-eddy simulation approaches has become increasingly popular in many scientific and engineering applications. The underlying filtering operation of the approach enables ...
    • El destí dels microplàstics en mars i oceans: un estudi de mecànica de fluids sobre l'agregació de partícules 

      Martínez i Bachs, Dídac (Universitat Politècnica de Catalunya, 2021-01-28)
      Bachelor thesis
      Open Access
      La presència de microplàstics en mars i oceans suposa una problemàtica pels ecosistemes marins afectant directament la salut dels éssers vius que s’hi troben. Els microplàstics col·lisionen amb biopartícules, per efecte ...
    • Emergence of spatio-temporal dynamics from exact coherent solutions in pipe flow 

      Ritter, Paul; Mellibovsky Elstein, Fernando; Àvila Cañellas, Marc (2016-08-12)
      Article
      Open Access
      Turbulent-laminar patterns are ubiquitous near transition in wall-bounded shear flows. Despite recent progress in describing their dynamics in analogy to non-equilibrium phase transitions, there is no theory explaining ...
    • Estimating turbulence kinetic energy dissipation rate in numerically simulated stratocumulus cloud-top mixing layers 

      Akinlabi, Emmanuel; Waclawczyk, Marta; Mellado González, Juan Pedro; Malinowski, Szymon (2019-05-01)
      Article
      Open Access
      In this work, direct numerical simulation (DNS) of the stratocumulus cloud-top mixing layer is used to test various approaches to estimate the turbulence kinetic energy (TKE) dissipation rate « from one-dimensional (1D) ...
    • Estudi aerodinàmic d'un edifici. Comparació de resultats obtinguts amb diferents programaris de CFD 

      Ricart Rius, Marc; Subirats Soler, Monica (Universitat Politècnica de Catalunya, 2009-07-24)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
    • Estudi experimental i de simulació per CFD d'un raig lliure d'aire a través d'un orifici amb Mach < 0,3 

      Beltrán Monzón, Álvaro (Universitat Politècnica de Catalunya, 2021-07-13)
      Bachelor thesis
      Open Access
      En aquest treball s’estudia el comportament dinàmic d’un raig d’aire lliure, tant a nivell experimental com en simulació per CFD (Dinàmica de Fluids Computacional). El procediment experimental té lloc al laboratori del ...
    • Estudi i modelització amb CFD d'una cambra climàtica 

      Brunsó i Villafranca, Jordi (Universitat Politècnica de Catalunya, 2020-07-08)
      Bachelor thesis
      Open Access
      En la realització d’aquest Treball de Fi de Grau, s’ha dut a terme una modelització i estudi del comportament del flux dins d’una cambra climàtica. Aquesta cambra és propietat de l’IREC (Institut de Recerca en Energia de ...
    • Estudio de los cambios en el comportamiento motriz de una población de lenguado (Solea senegalensis) en diferentes situaciones de cultivo 

      Crespo Abril, Maria (Universitat Politècnica de Catalunya, 2014-07-07)
      Bachelor thesis
      Open Access
      The knowledge of the farmed fish behavior is very important to control and improve their growth and reproduction. In this study, Doppler Acoustic Velocimeter (ADV) has been proposed as a tool to study the behavior of sole ...
    • Estudio y modelización mediante CFD de una cámara climática 

      Hueso Carro, Adrià (Universitat Politècnica de Catalunya, 2020-07-08)
      Bachelor thesis
      Open Access
      En l'actualitat, la Dinàmica de Fluids Computacional és àmpliament utilitzada en els diferents segments de la indústria a causa dels numerosos avantatges que presenta. Amb aquesta tècnica, es poden dur a terme prediccions ...