Now showing items 1-20 of 25

    • A CFD framework for offshore and onshore wind farm simulation 

      Avila, Matias; Gargallo-Peiró, Abel; Folch, Arnau (IOP Publishing, 2017)
      Article
      Open Access
      We present a wind simulation framework for offshore and onshore wind farms. The simulation framework involves an automatic hybrid high-quality mesh generation process, a pre-processing to impose initial and boundary ...
    • A Novel approach to reconstruct the plinian and co-ignimbrite phases of large eruptions - Campanian Ignimbrite 

      Marti, Alejandro; Folch, Arnau; Costa, Antonio; Engwell, Samantha (Barcelona Supercomputing Center, 2015-05-05)
      Conference report
      Open Access
      Reconstructing the volume and tephra dispersal from volcanic super-eruptions is necessary to assess the widespread impact of these massive events on climate, ecosystems and humans. Recent studies have demonstrated that ...
    • A Parallel CFD Model for Wind Farms 

      Avila, Matías; Folch, Arnau; Houzeaux, Guillaume; Eguzkitza, Beatriz; Prieto, Luis; Cabezón, Daniel (Elsevier, 2013-06-01)
      Article
      Open Access
      We present a Computational Fluid Dynamics (CFD) modeling strategy for onshore wind farms aimed at predicting and opti- mizing the production of farms using a CFD model that includes meteorological data assimilation, complex ...
    • A simplified model for bottom trawl fishing gears 

      Folch, Arnau; Prat Farran, Joana d'Arc; Antonijuan Rull, Josefina (2007-05-12)
      Article
      Open Access
      Computational modeling is a valuable complementary tool to assess behavior of bottom trawl fishing gears. A simplified model of the gear that mainly affects to the net is proposed. The model is constrained to steady towing ...
    • A simplified model for bottom trawl fishing gears 

      Folch, Arnau; Prat Farran, Joana d'Arc; Antonijuan Rull, Josefina; Sala, A.; Sardà, Francesc; Manuel Lázaro, Antonio (SARTI (Technological Development Centre of Remote Acquisition and Data processing Systems), 2008-04-08T15:55:17Z)
      Article
      Open Access
    • A wind field downscaling strategy based on domain segmentation and transfer functions 

      Barcons, Jordi; Avila, Matias; Folch, Arnau (Wiley, 2018-02-06)
      Article
      Open Access
      This paper presents a novel methodology for mesoscale‐to‐microscale downscaling of near‐surface wind fields. The model chain consists on the Weather Research and Forecast mesoscale model and the Alya‐CFDWind microscale ...
    • Beyond eruptive scenarios: assessing tephra fallout hazard from Neapolitan volcanoes 

      Sandri, Laura; Costa, Antonio; Selva, Jacopo; Tonini, Roberto; Macedonio, Giovanni; Folch, Arnau; Sulpizio, Roberto (Nature Publishing Group, 2016-04-12)
      Article
      Open Access
      Assessment of volcanic hazards is necessary for risk mitigation. Typically, hazard assessment is based on one or a few, subjectively chosen representative eruptive scenarios, which use a specific combination of eruptive ...
    • DISPAR: a tool to model bottom trawl fishing gears 

      Antonijuan Rull, Josefina; Prat Farran, Joana d'Arc; Folch, Arnau; Gualdo Sesma, Olga; Sardà, Francesc; Manuel Lázaro, Antonio (SARTI (Technological Development Centre of Remote Acquisition and Data processing Systems), 2008-04-08T16:01:20Z)
      Article
      Open Access
    • Diurnal cycle RANS simulations applied to wind resource assessment 

      Barcons, Jordi; Avila, Matias; Folch, Arnau (Wiley, 2019-02)
      Article
      Open Access
      Microscale computational fluid dynamics (CFD) models can be used for wind resource assessment on complex terrains. These models generally assume neutral atmospheric stratification, an assumption that can lead to inaccurate ...
    • FALL3D-8.0: a computational model for atmospheric transport and deposition of particles, aerosols and radionuclides – Part 2: Model validation 

      Prata, Andrew T.; Mingari, Leonardo; Folch, Arnau; Macedonio, Giovanni; Costa, Antonio (Copernicus Publications, 2021-01)
      Article
      Open Access
      This paper presents model validation results for the latest version release of the FALL3D atmospheric transport model. The code has been redesigned from scratch to incorporate different categories of species and to overcome ...
    • FPLUME-1.0: An integral volcanic plume model accounting for ash aggregation 

      Folch, Arnau; Costa, Antonio; Macedonio, Giovannin (EGU Journals, 2016-02-02)
      Article
      Open Access
      Eruption source parameters (ESP) characterizing volcanic eruption plumes are crucial inputs for atmospheric tephra dispersal models, used for hazard assessment and risk mitigation. We present FPLUME-1.0, a steady-state 1-D ...
    • Mesh generation, sizing and convergence for onshore and offshore wind farm Atmospheric Boundary Layer flow simulation with actuator discs 

      Gargallo Peiró, Abel; Avila, Matias; Owen, Herbert; Prieto-Godino, Luis; Folch, Arnau (Elsevier, 2018-12)
      Article
      Open Access
      A new mesh generation process for wind farm modeling is presented together with a mesh convergence and sizing analysis for wind farm flow simulations. The generated meshes are tailored to simulate Atmospheric Boundary Layer ...
    • Model validation and data insertion with FALL3D-8.0: exploiting geostationary satellite retrievals of volcanic ash and SO2 

      Prata, Andrew; Mingari, Leonardo; Folch, Arnau (Barcelona Supercomputing Center, 2020-05)
      Conference report
      Open Access
      The new version of FALL3D has recently been released with several new features and improvements in model physics, solving algorithms, code accuracy and performance [1]. Among the new features are a data insertion scheme ...
    • Multimodal deep learning methods for person annotation in video sequences 

      Folch, Arnau (Universitat Politècnica de Catalunya, 2018-10)
      Bachelor thesis
      Open Access
      The purpose of this project is to focus in exploring deep learning methods for multimodal person recognition in video sequences. The project will be carried out in the context of unsupervised person annotation systems for ...
    • Optimization of atmospheric transport models on HPC platforms 

      De la Cruz Martinez, Raul; Folch, Arnau; Farré, Pau; Cabezas, Javier; Navarro, Nacho; Cela Espín, José M. (2016-12)
      Article
      Open Access
      The performance and scalability of atmospheric transport models on high performance computing environments is often far from optimal for multiple reasons including, for example, sequential input and output, synchronous ...
    • Optimization of atmospheric transport models on HPC platforms 

      de la Cruz, Raúl; Folch, Arnau; Farré, Pau; Cabezas, Javier; Navarro, Nacho; Cela, José M. (Elsevier, 2016-12)
      Article
      Open Access
      The performance and scalability of atmospheric transport models on high performance computing environments is often far from optimal for multiple reasons including, for example, sequential input and output, synchronous ...
    • Potential ash impact from Antarctic volcanoes: Insights from Deception Island’s most recent eruption 

      Geyer, A.; Marti, Alejandro; Giralt, S.; Folch, Arnau (Nature Publishing Group, 2017-11-28)
      Article
      Open Access
      Ash emitted during explosive volcanic eruptions may disperse over vast areas of the globe posing a threat to human health and infrastructures and causing significant disruption to air traffic. In Antarctica, at least five ...
    • Reconstructing the plinian and co-ignimbrite sources of large volcanic eruptions: A novel approach for the Campanian Ignimbrite 

      Marti, Alejandro; Folch, Arnau; Costa, Antonio; Engwell, Samantha (Nature Publishing Group, 2016-02-17)
      Article
      Open Access
      The 39 ka Campanian Ignimbrite (CI) super-eruption was the largest volcanic eruption of the past 200 ka in Europe. Tephra deposits indicate two distinct plume forming phases, Plinian and co-ignimbrite, characteristic of ...
    • Representing Urban Geometries for Unstructured Mesh Generation 

      Gargallo-Peiró, Abel; Folch, Arnau; Roca, Xevi (Elsevier, 2016)
      Article
      Open Access
      We present a robust and automatic method to generate an idealized surface geometry of a city landscape ready to be meshed for computer simulations. The city geometry is idealized for non viscous flow simulations and targets ...
    • Results of the eruptive column model inter-comparison study 

      Costa, Antonio; Suzuki, Yujiro J.; Cerminara, Matteo; Devenish, Ben J.; Ongaro, Tomaso E.; Herzog, Michael; van Eaton, Alexa R.; Denby, L. C.; Bursik, Marcus I.; Vitturi, M. de' Michieli; Engwell, Samantha L.; Neri, Augusto; Barsotti, Sara; Folch, Arnau; Macedonio, Giovanni V.; Girault, Frédéric; Carazzo, Guillaume; Tait, Steve R.; Kaminski, Édouard; Mastin, Larry G.; Woodhouse, Mark J.; Phillips, Jeremy C.; Hogg, Andrew J. C.; Degruyter, Wim; Bonadonna, Constanza (Elsevier, 2016-02-06)
      Article
      Open Access
      To improve our understanding of the physics of volcanic plumes and their interaction with the atmosphere, increasingly sophisticated numerical models of eruptive columns have been developed by a growing number of research ...