| Autor: |
null Sergio Daruis, null Roger Matsumoto Moreira, null Marcio Zamboti Fortes, null Rafael Eitor dos Santos |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
CFD Letters. 14:14-31 |
| ISSN: |
2180-1363 |
| DOI: |
10.37934/cfdl.14.4.1431 |
| Popis: |
This work aims to predict numerically the vertical motions (heave and pitch) of a Wigley ship model heading over regular waves at Campos Basin, Brazil. Critical levels of periods and amplitudes from waves are determined based on historical data, these are re-dimensioned to a small scale and used as input data to the model. The flow is assumed to be incompressible and viscous with mass and momentum fluxes being conserved. The Computational Fluid Dynamics (CFD) software ANSYS Fluent which makes use of the finite volume method (FVM) is employed to solve continuity and the unsteady Reynolds Averaged Navier-Stokes (RANS) equations with a Shear-Stress Transport (SST) κ-ω turbulence model. The air-water interface is modelled via the Volume of Fluid (VOF) method. An UDF (User Defined Function) is set to simulate only these two degrees of freedom for the ship motion and different sea conditions are simulated with Response Amplitude Operators (RAOs) being compared to experiments, with a good agreement being found. The Campos Basin wave from the Southwest direction with a 1-year occurrence period is a wave with the highest dimensionless value resulting in a 0.172 of heave and the wave that has a North direction with a 1-year occurrence period is a wave with the highest dimensionless value resulting from the 0.097° pitch. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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