In this paper we investigate the so-called harbour oscillations problem by means of efficient time-domain high-resolution numerical simulations. The method proposed here is able to handle an arbitrary geometry of the docks/piers and variable water depth, so that reflection, diffraction and refraction effects are taken into account simultaneously. Partial absorption from selected walls/protections can also be introduced and tuned locally. A very efficient technique for the absorption of outgoing waves is also implemented. Due to the specific parallel implementation of the code according to the Message Passing Interface (MPI), the numerical scheme is able to handle quite large physical domains with extremely good computing performances (e.g. 600m x 600m on a 20 CPU’s cluster with 40 Gb of RAM) with high resolution grids the allow the analysis with cells size of approximately 1mx1m in full scale. Some “academic” test cases are presented first, comparing the results to analytical and experimental data available in the literature. As a practical case study, the method has been applied to the harbour of Trieste (Italy-North Adriatic Sea) with actual sea spectra from North-West to South-West.
High Resolution Numerical Simulations of Harbour Oscillations
CONTENTO, GIORGIO;
2006-01-01
Abstract
In this paper we investigate the so-called harbour oscillations problem by means of efficient time-domain high-resolution numerical simulations. The method proposed here is able to handle an arbitrary geometry of the docks/piers and variable water depth, so that reflection, diffraction and refraction effects are taken into account simultaneously. Partial absorption from selected walls/protections can also be introduced and tuned locally. A very efficient technique for the absorption of outgoing waves is also implemented. Due to the specific parallel implementation of the code according to the Message Passing Interface (MPI), the numerical scheme is able to handle quite large physical domains with extremely good computing performances (e.g. 600m x 600m on a 20 CPU’s cluster with 40 Gb of RAM) with high resolution grids the allow the analysis with cells size of approximately 1mx1m in full scale. Some “academic” test cases are presented first, comparing the results to analytical and experimental data available in the literature. As a practical case study, the method has been applied to the harbour of Trieste (Italy-North Adriatic Sea) with actual sea spectra from North-West to South-West.Pubblicazioni consigliate
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