Abstract
In this study, we evaluate lattice Boltzmann and finite element methods for wind load estimation of parabolic trough solar collectors. Mean, root-mean-square (RMS) and peak values of aerodynamic load coefficients of an isolated collector are estimated using large-eddy simulation and compared with experimental results obtained in a boundary layer wind tunnel. Despite their fundamental differences, the two numerical approaches yield similar values for the drag, lift and pitching moment indicating that the results are essentially independent of the numerical schemes. Time-varying inlet boundary conditions are obtained using an efficient synthetic generation technique. The statistics of the numerical boundary layer are investigated by comparing mean and turbulence intensity profiles at varying distances from the inlet as well as the spectra and autocorrelation at the position of the structure. Through appropriate modelling of the boundary layer, the numerical models are shown to reproduce the mean, RMS and peak load behaviour measured in the wind tunnel.
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