Journal article
URANS and DES analysis for a Wigley hull at extreme drift angles
Journal of marine science and technology, Vol.15(4), pp.295-315
12/2010
DOI: 10.1007/s00773-010-0092-z
Abstract
Vortical structures and associated instabilities for flows around the Wigley hull for a wide range of drift angles (10° ≤ α ≤ 60°) with free surface are identified and analyzed. Quantitative verification and validation are conducted on three systematically refined grids with comparison to the experimental data for α = 10°. Analysis of the flow pattern shows a strong correlation between the vortical structures and free-surface wave elevation. For α = 10° and 30°, the flows remain steady and vortices are generated at the keel and fore and aft perpendiculars of the hull. The strength and complexity of these vortices increase with increasing α. At α = 45°, flow becomes unsteady without any significant change in the main flow pattern. At α = 60°, a complex and unsteady flow field on the leeward side of the hull is formed with a large recirculation region from the aft to the fore end, which prevents the flow coming from below the keel from moving up and generating the keel vortices observed at lower drift angles. Karman-like and helical instabilities are analyzed. The effect of Froude number is more apparent for large than for small drift angles.
Details
- Title: Subtitle
- URANS and DES analysis for a Wigley hull at extreme drift angles
- Creators
- Antonio Pinto-Heredero - ETSIN, CEHINAV Model Basin Technical University of Madrid Avda. Arco de la Victora s/n Ciudad Universitaria 28040 Madrid SpainTao Xing - Mechanical Engineering Department, College of Engineering, Architecture and Physical Sciences Tuskegee University Tuskegee AL 36088 USAFrederick Stern - IIHR, Hydroscience and Engineering, C. Maxwell Stanley Hydraulics Laboratory The University of Iowa Iowa City IA 52242-1585 USA
- Resource Type
- Journal article
- Publication Details
- Journal of marine science and technology, Vol.15(4), pp.295-315
- Publisher
- Springer Japan; Japan
- DOI
- 10.1007/s00773-010-0092-z
- ISSN
- 0948-4280
- eISSN
- 1437-8213
- Language
- English
- Date published
- 12/2010
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984064252002771
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