Large-eddy simulations of a sediment plume released by a dredger using overflow
| Autor: | Marc Sas, Boudewijn Decrop, Erik Toorman, T. De Mulder |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Engineering
010504 meteorology & atmospheric sciences business.industry Propeller Sediment Computational fluid dynamics 01 natural sciences 010305 fluids & plasmas Plume Dredging Hull 0103 physical sciences Geotechnical engineering Turbidity business 0105 earth and related environmental sciences Water Science and Technology Marine engineering Large eddy simulation |
| Zdroj: | Journal of Applied Water Engineering and Research. 6:62-69 |
| ISSN: | 2324-9676 |
| DOI: | 10.1080/23249676.2016.1209441 |
| Popis: | Sediment plume predictions are part of the assessment of environmental impacts of dredging. The main source of turbidity while employing Trailer Suction Hopper Dredgers is the release of excess water through the overflow shaft. The near-field plume dynamics below and directly behind the sailing hopper dredgers are traditionally unknown during predictions of far-field plume dispersion. Indeed, an accurate input of the vertical and horizontal distributions of sediment at the source location is important to obtain reliable results at environmentally sensitive areas further away. In this paper, a computational fluid dynamics model is presented as a tool to determine the three-dimensional flows of water, sediment and air bubbles directly after release from the overflow shaft. The full dredger hull geometry and an actuator disc accounting for propeller action are included. It is shown that the model can reproduce two different cases of overflow plumes measured in the field with fair accuracy. |
| Databáze: | OpenAIRE |
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