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Mesh generation, sizing and convergence for onshore and offshore wind farm Atmospheric Boundary Layer flow simulation with actuator discs

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Mesh generation, sizing and convergence for onshore and offshore wind farm Atmospheric Boundary Layer flow simulation with actuator discs.pdf (6,218Mb)
 
10.1016/j.jcp.2018.08.031
 
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hdl:2117/121893

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Gargallo Peiró, AbelMés informacióMés informacióMés informació
Avila, Matias
Owen, Herbert
Prieto-Godino, Luis
Folch, ArnauMés informació
Document typeArticle
Defense date2018-12
PublisherElsevier
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 4.0 Spain
This work is protected by the corresponding intellectual and industrial property rights. Except where otherwise noted, its contents are licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 4.0 Spain
ProjectEoCoE - Energy oriented Centre of Excellence for computer applications (EC-H2020-676629)
HPC4E - HPC for Energy (EC-H2020-689772)
Abstract
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 (ABL) flows on complex terrains modeling the wind turbines as actuator discs. The wind farm mesher is fully automatic and, given the topography and the turbine characteristics (location, diameter and hub height), it generates a hybrid mesh conformal with the actuator discs and refined upwind and downstream. Moreover, it presents smooth element size transitions across scales and avoids extending high-resolution areas to all the domain. We take advantage of our automatic and robust mesher to study the mesh convergence of our RANS solver with linear elements, obtaining quadratic mesh convergence for a quantity of interest in all the tested cases. In addition, we quantify the mesh resolution at the terrain surface and at the actuator discs required to achieve a given numerical error in simulations in onshore and offshore frameworks. Finally, we present the generated meshes and the simulation results for an offshore and an onshore wind farm. We analyze in detail one particular wind direction for both cases, and for the onshore wind farm we use our automatic framework to estimate the yearly production of energy and measuring the error against the actual produced one.
CitationGargallo-Peiró, A. [et al.]. Mesh generation, sizing and convergence for onshore and offshore wind farm Atmospheric Boundary Layer flow simulation with actuator discs. "Journal of computational physics", desembre 2018, vol. 375, p. 209-227. 
URIhttp://hdl.handle.net/2117/121893
DOI10.1016/j.jcp.2018.08.031
ISSN0021-9991
Publisher versionhttps://www.sciencedirect.com/science/article/pii/S0021999118305540#ac0010
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