Now showing items 1-20 of 29

    • 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 hybrid meshing framework adapted to the topography to simulate atmospheric boundary layer flows 

      Gargallo Peiró, Abel; Avila, Matias; Folch, Arnau (Elsevier, 2022)
      Article
      Restricted access - publisher's policy
      A new topography adapted mesh generation framework tailored to simulate Atmospheric Boundary Layer (ABL) flows on complex terrains is presented. The mesher is fully automatic given: the maximum and minimum surface mesh ...
    • 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 ...
    • Data assimilation of volcanic aerosol observations using FALL3D+PDAF 

      Mingari, Leonardo; Folch, Arnau; Prata, Andrew T.; Pardini, Federica; Macedonio, Giovanni; Costa, Antonio (Copernicus Publications, 2022-02)
      Article
      Open Access
      Modelling atmospheric dispersal of volcanic ash and aerosols is becoming increasingly valuable for assessing the potential impacts of explosive volcanic eruptions on buildings, air quality, and aviation. Management of ...
    • 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 ...
    • Ensemble-based forecast of volcanic clouds using FALL3D-8.1 

      Folch, Arnau; Mingari, Leonardo; Prata, Andrew T. (Frontiers Media, 2022-01)
      Article
      Open Access
      Operational forecasting of volcanic ash and SO<sub>2</sub> clouds is challenging due to the large uncertainties that typically exist on the eruption source term and the mass removal mechanisms occurring downwind. Current ...
    • 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 ...
    • Long-term hazard assessment of explosive eruptions at Jan Mayen (Norway) and implications for air traffic in the North Atlantic 

      Titos, Manuel; Martínez Montesinos, Beatriz; Barsotti, Sara; Sandri, Laura; Folch, Arnau; Mingari, Leonardo; Macedonio, Giovanni; Costa, Antonio (Copernicus Publications, 2022-01)
      Article
      Open Access
      Volcanic eruptions are among the most jeopardizing natural events due to their potential impacts on life, assets, and the environment. In particular, atmospheric dispersal of volcanic tephra and aerosols during explosive ...
    • 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 ...