Ara es mostren els items 65-84 de 227

    • Effect of the actuation on the boundary layer of an airfoil at moderate reynolds number 

      Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Borrell Pol, Ricard (Springer, 2020)
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      Synthetic (zero net mass flux) jets are an active flow control technique to manipulate the flow field in wall-bounded and free-shear flows. The fluid necessary to actuate on the boundary layer is intermittently injected ...
    • Effectiveness of adaptive mesh refinement strategies in the DNS of multiphase flows 

      Schillaci, Eugenio; Antepara Zambrano, Óscar; Lehmkuhl Barba, Oriol; Balcázar Arciniega, Néstor; Oliva Llena, Asensio (Begell House, 2015)
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      In this work, a finite-volume Adaptive Mesh Refinement (AMR) method for two phase flows able to dynamically achive the required mesh size in specific parts of the domain has been developed. The Navier-Stokes equations for ...
    • Effects of the actuation on the boundary layer of an airfoil at Reynolds Number Re = 60000 

      Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard (Springer-Verlag, 2020-05-29)
      Article
      Accés obert
      Synthetic (zero net mass flux) jets are an active flow control technique to manipulate the flow field in wall-bounded and free-shear flows. The present paper focuses on the role of the periodic actuation mechanisms on the ...
    • Energy simulation of a single family dwelling as a test bench for climate control system assessment 

      Capdevila Paramio, Roser; Souaihi, Oussama; Lopez, Joan; Rigola Serrano, Joaquim; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio (2016)
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      In the present work a real dwelling (a semi-detached house in the Netherlands) has been modelled with an in-house modular object-oriented building simulation tool, called NEST-Buildings. This software models the whole ...
    • Energy simulation of a single family dwelling with a modular object-oriented tool 

      Capdevila Paramio, Roser; Chiva Segura, Jorge; López Mas, Joan; Rigola Serrano, Joaquim; Lehmkuhl Barba, Oriol (2015)
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    • Energy simulation of buildings with a modular object-oriented tool 

      Mohan Damle, Rashmin; Lehmkuhl Barba, Oriol; Colomer Rey, Guillem; Rodríguez Pérez, Ivette María (2011)
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      Accés obert
      The aim of this work is to develop a modular object-oriented tool “NEST” (Numerical Edifice Simulation Tool) for the energy simulation of buildings, which can be coupled with a parallel CFD software. For this purpose, a ...
    • Evaluating the roles of detailed endocardial structures on right ventricular haemodynamics by means of CFD simulations 

      Sacco, Federica; Paun, Bruno; Lehmkuhl Barba, Oriol; Iles, Tinen L.; Iaizzo, Paul A.; Houzeaux, Guillaume; Vázquez, Mariano; Butakoff, Constantine; Aguado-Sierra, Jazmin (Wiley, 2018-09)
      Accés obert
      Computational modelling plays an important role in right ventricular (RV) haemodynamic analysis. However, current approaches use smoothed ventricular anatomies. The aim of this study is to characterise RV haemodynamics ...
    • Evaporation of volatile droplets subjected to flame-like conditions 

      Both, Ambrus; Mira Martínez, Daniel; Lehmkuhl Barba, Oriol (Elsevier, 2022-05-15)
      Article
      Accés obert
      This work assesses Lagrangian droplet evaporation models frequently used in spray combustion simulations, with the purpose of identifying the influence of modeling decisions on the single droplet behavior. Besides more ...
    • Fast urban flow predictions through Convolutional Neural Networks 

      Calafell Sandiumenge, Joan; Bustillo, Jaime; Gomez Gonzalez, Samuel; Ramírez Jávega, Francisco; Radhakrishnan, Sarath; Lehmkuhl Barba, Oriol (2023)
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      Having real-time and accurate numerical predictions of urban wind flow can be extremely useful for developing tools intended to improve citizens’ life quality and health. However, traditional methods such as Computational ...
    • FFT-based Poisson Solver for large scale numerical simulations of incompressible flows 

      Borrell Pol, Ricard; Lehmkuhl Barba, Oriol; Trias Miquel, Francesc Xavier; Oyarzún, G.; Oliva Llena, Asensio (2011)
      Comunicació de congrés
      Accés obert
      In the context of time-accurate numerical simulation of incompressible flows, a Poisson equation needs to be solved at least once per time-step to project the velocity field onto a divergence-free space. Due to the non-local ...
    • Fixed-grid numerical modeling of melting and solidification using variable thermo-physical properties - Application to the melting of n-Octadecane inside a spherical capsule 

      Galione Klot, Pedro Andrés; Lehmkuhl Barba, Oriol; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2015-07-01)
      Article
      Accés obert
      A fixed-grid enthalpy model for unstructured meshes and explicit time integration schemes (Galione et al., 2014) is here extended for taking into account the change in density and other thermo-physical properties with the ...
    • Flow and heat transfer in a wall-bounded pin matrix 

      Paniagua Sánchez, Leslye; Oliet Casasayas, Carles; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David (Begell House, 2012)
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    • Flow and turbulent structures around simplified car models 

      Aljure Osorio, David E.; Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Oliva Llena, Asensio (Elsevier, 2014-06-13)
      Article
      Accés obert
      External car aerodynamics study has great importance in overall car efficiency and ride stability, being a key element in successful automotive design. The flow over car geometries shows three dimensional and unsteady ...
    • Flow Control in Wings and Discovery of Novel Approaches via Deep Reinforcement Learning 

      Vinuesa, Ricardo; Lehmkuhl Barba, Oriol; Lozano Durán, Adrian; Rabault, Jean (MDPI, 2022)
      Article
      Accés obert
      In this review, we summarize existing trends of flow control used to improve the aerodynamic efficiency of wings. We first discuss active methods to control turbulence, starting with flat-plate geometries and building ...
    • Flow dynamics in the turbulent wake of a sphere at sub-critical Reynolds numbers 

      Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Oliva Llena, Asensio (2011)
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      The direct numerical simulation of the flow over a sphere is performed. The computations are carried out in the sub-critical regime at Re = 3700 and Re = 10000 (based on the free-stream velocity and the sphere diameter). ...
    • Flow past a NACA0012 airfoil: from laminar separation bubbles to fully stalled regime 

      Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Oliva Llena, Asensio (Springer, 2013)
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    • Flow Separation in Airfoils with Rough Leading Edges 

      Kumar, Vishal; Miró, Arnau; Lehmkuhl Barba, Oriol; Piomelli, Ugo (American Institute of Aeronautics and Astronautics, 2023)
      Article
      Accés obert
      In this study we consider the flow over airfoils with leading-edge roughness, designed to mimic the ice depositions that may occur on an aircraft in flight. The focus of this investigation is the effect of the angle of ...
    • Flow separation in airfoils with rough leading edges 

      Kumar, Vishal; Miró Jané, Arnau; Lehmkuhl Barba, Oriol; Piomelli, Ugo (2023-05)
      Article
      Accés obert
      In this study we consider the flow over airfoils with leading-edge roughness, designed to mimic the ice depositions that may occur on an aircraft in flight. The focus of this investigation is the effect of the angle of ...
    • Fluid dynamics and heat transfer in the wake of a sphere 

      Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Soria Guerrero, Manel; Gómez, Samuel; Domínguez Pumar, Manuel; Kowalski, Lukasz (2019-04)
      Article
      Accés obert
      Direct numerical simulation and large-eddy simulation have been performed for a heated sphere at Reynolds numbers of $Re=1000$ and $Re=10^4$, respectively. The Prandtl number for both simulations has been $Pr=0.7$. ...
    • Fluid-structure interaction based on HPC multicode coupling 

      Cajas García, Juan Carlos; Houzeaux, Guillaume; Vázquez, Mariano; Garcia Gasulla, Marta; Casoni Rero, Eva; Calmet, Hadrien; Artigues, Antoni; Borrell Pol, Ricard; Lehmkuhl Barba, Oriol; Pastrana Maldonado, Daniel; Yáñez, David; Pons, Ramon; Martorell Lopez, Jordi (2018)
      Article
      Accés restringit per política de l'editorial
      The fluid-structure interaction (FSI) problem has received great attention in the last few years, mainly because it is present in many physical systems, industrial applications, and almost every biological system. In the ...