TEMPORAL DISCRETIZATION ANALYSIS FOR THE NUMERICAL SIMULATION OF A WAVES SPECTRUM OF THE PIERSON - MOSKOWITZ TYPE
DOI:
https://doi.org/10.26512/ripe.v5i1.19116Keywords:
Wave Tank. Volume of Fluid. Wave Spectrum. Numerical Beach.Abstract
The present work presents a methodology for the numerical simulation of wave spectrum in tanks. The objective is to obtain recommendations on temporal discretization. To that end, the Pierson-Moskowitz wave spectrum used in the present study has some characteristics such as significant wave height (HS) of 1.5 m and significant wave period (TS) of 7.5 s. The computational domain is two-dimensional and represents a number-wave tank. In addition, an important update in the computational model is the elimination of the reflection of the waves through a region of cushioning, called numeric beach. For the numerical solution, a computational fluid dynamics code, FLUENT®, was used based on the Finite Volume Method (MVF). Geometry and mesh generation are developed in GAMBIT® software. The Multiphase Volume of Fluid (VOF) model is applied in the treatment of water-air interaction. The results indicate that it is possible to reproduce numerically the propagation of wave spectrum in tanks with accuracy, which is an advance in representing the ocean phenomena in a more realistic way. Therefore, these results can be used in future work, mainly in the numerical study of sea wave energy converters in electrical energy, such as oscillating water column (OWC) and overtopping devices.
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