Performance Assessment of Three Turbulence Models Validated through an Experimental Wave Flume under Different Scenarios of Wave Generation
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2020-11-05
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Multidisciplinary Digital Publishing Institute (MDPI)
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Abstract
This study aimed to adjust the turbulence models to the real behavior of the numerical wave
flume (NWF) and the future research that will be carried out on it, according to the turbulence model
that best adjusts to each particular case study. The k-", k-! and large-eddy simulation (LES) models,
using the volume of fluid (VOF) method, were analyzed and compared respectively. The wavemaker
theory was followed to faithfully reproduce the waves, which were measured in an experimental wave
flume (EWF) and compared with the theory to validate each turbulence model. Besides, reflection
was measured with the Mansard and Funke method, which has shown promising results when
studying one of the most critical turbulent behaviors in the wave flume, called the breaking of the
waves. The free surface displacement obtained with each turbulence model was compared with the
recorded signals located at three points of the experimental wave flume, in the time domain of each
run, respectively. Finally, the calculated reflection coefficients and the amplitudes of the reflected
waves were compared, aiming to have a better understanding of the wave reflection process at the
extinction zone. The research showed good agreement between all the experimental signals and the
numerical outcomes for all the turbulence models analyzed.
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Galera-Calero, Lander, Jesús María Blanco, Urko Izquierdo, and Gustavo Adolfo Esteban. “Performance Assessment of Three Turbulence Models Validated through an Experimental Wave Flume Under Different Scenarios of Wave Generation.” Journal of Marine Science and Engineering 8, no. 11 (November 5, 2020): 881. doi:10.3390/jmse8110881.