Journal article
The hydrodynamic forces on a circular cylinder in proximity to a wall with intermittent contact in steady current
Ocean Engineering, Vol.146, pp.424-433
01/12/2017
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Source: InCites
Abstract
We present a three-dimensional Large Eddy Simulations (LES) study on the hydrodynamics of a circular cylinder dose to a wall. Intermittent gaps between the cylinder and wall, forming spanning and non-spanning sections along the span are considered. This geometry setting represents an idealized model of pipelines laid on an uneven seabed. As compared to that of the corresponding spanwise-uniform cylinders, the drag coefficient on spanning sections is generally smaller, while the drag on non-spanning sections is slightly larger. Large amplitudes of the sectional forces are observed, partially due to the variations of the gap flow under the spanned sections. Flow deflection from the non-spanning section to the spanning section induces changes in local force and pressure distributions. Despite these changes, the mean force on the cylinder with intermittent contact as a whole is shown to be reasonably estimated by pro rata of forces from spanwise-uniform cylinders over the parameter space considered in this study.
Details
- Title
- The hydrodynamic forces on a circular cylinder in proximity to a wall with intermittent contact in steady current
- Creators
- Feifei Tong - University of Western AustraliaLiang Cheng - Dalian University of TechnologyHongwei An - University of Western AustraliaTerry Griffiths - University of Western Australia
- Publication Details
- Ocean Engineering, Vol.146, pp.424-433
- Publisher
- Elsevier
- Number of pages
- 10
- Grant note
- Australian Government; CGIAR ECR supporting scheme from the University of Western Australia Government of Western Australia DE150100428 / Australian Research Council through DECRA Schemes; Australian Research Council
- Identifiers
- 991013042413702368
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article