Modelling the hydrodynamic effect of abrupt water depth changes on a ship travelling in restricted waters using CFD
| Autor: | Tahsin Tezdogan, Atilla Incecik, Momchil Terziev |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
business.industry
VM Mechanical Engineering 020101 civil engineering Ocean Engineering 02 engineering and technology Computational fluid dynamics 01 natural sciences 010305 fluids & plasmas 0201 civil engineering Ship hydrodynamics Water depth Waves and shallow water 0103 physical sciences Fluid dynamics Underwater business Reynolds-averaged Navier–Stokes equations Constant (mathematics) Geology Marine engineering |
| Zdroj: | Ships and Offshore Structures. 16:1087-1103 |
| ISSN: | 1754-212X 1744-5302 |
| DOI: | 10.1080/17445302.2020.1816731 |
| Popis: | Shallow water studies of ship hydrodynamics typically examine a single, constant underwater canal cross-section at a time. In practice, the underwater cross-sectional area and shape of the waterway is rarely, maintained constant over long distances. This study presents an attempt to quantify the effects of an abruptly varying water depth by numerically modelling such a condition using CFD. The results show that waves propagate and refract in the numerical towing tank in a physically consistent manner showing less than 0.1% error in the dissipation of a solitary wave when compared to analytical relations. A strong boundary layer is formed on the canal bottom almost as soon as the ship enters the shallower region. The resistance increase, resulting from the depth change is up to approximately 226% of the initial value near critical speeds. |
| Databáze: | OpenAIRE |
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