The shedding and evolution of the vortical structures generated by a solitary wave propagating over a submerged cylindrical structure are investigated experimentally and numerically. The cylindrical structure consists of two concentric cylinders and represents a simplified model for an offshore submerged intake structure typically used in coastal power plants. Flow visualization by dye injection is used to identify the dominant vortical structures near the structure. The flow visualization results show an unexpected flow reversal that causes shedding of secondary vortical structures. The experimental results are used to check a three-dimensional volume of fluid-large eddy simulation (VOF-LES) numerical model. The VOF-LES model is then used to further study the flow structure. A total of six dominant vortical structures generated by the wave motion are identified, followed by two more generated by the flow reversal. In summary, this paper provides the vorticity evolution for a complex fluid-structure interaction problem and a three-dimensional numerical simulation tool has also been validated, which can be extended to study more complex geometries and wave conditions.

Item Type:	Refereed Article
Keywords:	offshore intake, submerged cylindrical structure, solitary wave, flow visualization, vortex shedding, fluid-structure interaction, VOF-LES, numerical simulation
Research Division:	Engineering
Research Group:	Fluid mechanics and thermal engineering
Research Field:	Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics)
Objective Division:	Expanding Knowledge
Objective Group:	Expanding knowledge
Objective Field:	Expanding knowledge in engineering
UTAS Author:	Zarruk Serrano, GA (Dr Gustavo Zarruk Serrano)
ID Code:	121065
Year Published:	2015
Web of Science® Times Cited:	17
Deposited By:	Australian Maritime College
Deposited On:	2017-09-08
Last Modified:	2017-10-23
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