November 22, 2021 Video/Audio Open Access

Lahooti, Mohsen; Puraca, Rudolfo; Carmo, Bruno; Palacios, Rafael; Sherwin, Spencer

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    "description": "<p>Wall-resolved fluid-structure interaction (FSI) numerical simulations of the NREL 5 MW wind turbine blade<br>\nare compared using two FSI approaches. The first method is based on high-fidelity Nektar++/SHARPy FSI framework,<br>\nwhere the fluid governing equations are solved using high-order spectral/hp element method and the turbulent flow is<br>\nresolved using Large Eddy Simulation (LES) on thick strips, while large-deformation dynamics of the structure are mod-<br>\nelled using a geometrically exact nonlinear composite beam finite-element model. Thick strip method for the fluid reduces<br>\nthe computational cost by considering a series of smaller domains, each of which has a finite thickness in the spanwise<br>\ndirection. Hence, the overall flow over the blade is treated with a sectional approach, where in each of these sections,<br>\nstrips, the 3D flow is reconstructed locally. Tip-loss correction is used to compensate for the sectional approach over the<br>\nblade. The second FSI approach is based on OpenFoam/Calculix coupling, where the second-order unstructured finite<br>\nvolume method approach is used for solving the three-dimensional flow equations and the flow turbulence is captured us-<br>\ning the k-&omega; SST model. The structural dynamics are modeled via second-order finite element method using standard solid<br>\nelements. Effects of the solution fidelity on the prediction of aerodynamic forces as well as on the full three-dimensional<br>\nflow modelling over the blade versus sectional representation of flow over the blade while incorporating the local three-<br>\ndimensionality in each section and tip-correction are discussed. Further, significance of two approaches on modelling<br>\nthe slender blade, one using the beam mode and the other utilizing the full 3D solution of structure is addressed. Finally,<br>\nassessment of computational cost and scalability of the two approaches are presented and discussed.</p>", 
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    "title": "Wall Resolved Fluid-Structure Interaction Numerical Simulation of a Modern Wind Turbine Blade", 
    "notes": "Video of my presentatin at COBEM 21", 
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        "title": "High performance computing for wind energy", 
        "acronym": "HPCWE", 
        "program": "Horizon 2020 Framework Programme - Research and Innovation action", 
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    "keywords": [
      "Fluid-structure interaction, Large Eddy simulation, wind energy, wind turbine blades, aeroelasticity"
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    "publication_date": "2021-11-22", 
    "creators": [
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        "orcid": "0000-0002-9659-7344", 
        "affiliation": "Imperial College London", 
        "name": "Lahooti, Mohsen"
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        "affiliation": "University of S\u00e3o Paulo", 
        "name": "Puraca, Rudolfo"
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      {
        "affiliation": "University of S\u00e3o Paulo", 
        "name": "Carmo, Bruno"
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      {
        "affiliation": "Imperial College London", 
        "name": "Palacios, Rafael"
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        "affiliation": "Imperial College London", 
        "name": "Sherwin, Spencer"
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      "acronym": "COBEM", 
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      "title": "COBEM21, 26th International congress of Mechanical Engineering"
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