Journal ArticleDOI
One-Dimensional Wave Bottom Boundary Layer Model Comparison: Specific Eddy Viscosity and Turbulence Closure Models
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TLDR
In this article, six one-dimensional-vertical wave bottom boundary layer models are analyzed based on different methods for estimating the turbulent eddy viscosity: Laminar, linear, parabolic, \Ik\N-one equation turbulence closure, ǫ-N-e, Ã-n-ǫ, and à -ǫ n−ǫ two equation turbulence closures.Abstract:
Six one-dimensional-vertical wave bottom boundary layer models are analyzed based on different methods for estimating the turbulent eddy viscosity: Laminar, linear, parabolic, \Ik\N—one equation turbulence closure, \Ik\N–e—two equation turbulence closure, and \Ik\N-ω—tw equation turbulence closure. Resultant velocity profiles, bed shear stresses, and turbulent kinetic energy are compared to laboratory data of oscillatory flow over smooth and rough beds. Bed shear stress estimates for the smooth bed case were most closely predicted by the \Ik\N–ω model. Normalized errors between model predictions and measurements of velocity profiles over the entire computational domain collected at 15° intervals for one-half a wave cycle show that overall the linear model was most accurate. The least accurate were the laminar and \Ik\N–e models. Normalized errors between model predictions and turbulence kinetic energy profiles showed that the \Ik\N–ω model was most accurate. Based on these findings, when the smallest overall velocity profile prediction error is required, the processing requirements and error analysis suggest that the linear eddy viscosity model is adequate. However, if accurate estimates of bed shear stress and TKE are required then, of the models tested, the \Ik\N–ω model should be used.read more
Citations
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Inverse modeling of velocities and inferred cause of overwash that emplaced inland fields of boulders at Anegada, British Virgin Islands
TL;DR: In this paper, a combination of numeric hydrodynamic models, a large-clast inverse sediment-transport model, and extensive field measurements were used to discriminate between a tsunami and a storm striking Anegada, BVI a few centuries ago.
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Advances in swash-zone research: Small-scale hydrodynamic and sediment transport processes
TL;DR: In this article, the authors reviewed and synthesized from 2004 onward the research advances of small-scale hydrodynamics and sediment transport processes considering field, laboratory and numerical modeling efforts.
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Bed slope effects on turbulent wave boundary layers: 1. Model validation and quantification of rough‐turbulent results
TL;DR: In this paper, a numerical model solving incompressible Reynolds-averaged Navier-Stokes equations, combined with a two-equation k-ω turbulence closure, is used to study converging-diverging effects from a sloping bed on turbulent (oscillatory) wave boundary layers.
Journal ArticleDOI
Prediction of the surface temperature of building-integrated photovoltaics: Development of a high accuracy correlation using computational fluid dynamics
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Impact of sediment-induced stratification and turbulence closures on sediment transport and morphological modelling
TL;DR: In this article, the impacts of sediment-induced stratification, erosion parameterization, and turbulence closures on sediment transport and morphological simulations are investigated using a three-dimensional model.
References
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