Vortex shedding of hulls in close proximity with relative motion

Ian A. Milne, J. Michael R. Graham

Research output: Chapter in Book/Conference paperConference paper

3 Citations (Scopus)

Abstract

The safe and efficient offloading of liquid natural gas (LNG) in a side-by-side configuration has emphasised the need to accurately quantify the hydrodynamic responses of floating bodies when located in very close proximity. A new series of computational results are presented for the forced roll of a hull in the presence of a second body representative of a floating FLNG facility. The vortex shedding phenomenon which provides a significant contribution to the damping of an isolated hull, is demonstrated to be modified by the presence of the second body. The total damping coefficients were found to be significantly reduced by approximately 50 percent for the very small gap widths considered. It is shown that in addition to the modification of the local shedding dynamics, the variation in the pressure field owing to the presence of the second body also contributes significantly to the reduction in the damping. The findings will be of particular interest to the offshore industry for improving and optimising offloading practices.

Original languageEnglish
Title of host publicationProceedings of the ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering
Subtitle of host publicationOMAE 2018
Place of PublicationUSA
PublisherAMER SOC MECHANICAL ENGINEERS
Number of pages9
Volume7A
ISBN (Electronic)9780791851265
ISBN (Print)9780791851265
DOIs
Publication statusPublished - 2018
EventASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018 - Madrid Marriott Auditorium Hotel & Conference Centre, Madrid, Spain
Duration: 17 Jun 201822 Jun 2018
https://www.asme.org/events/omae

Publication series

NameProceedings of the ASME International Conference on Ocean Offshore and Arctic Engineering
PublisherAMER SOC MECHANICAL ENGINEERS
ISSN (Print)2153-4772

Conference

ConferenceASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018
Abbreviated titleOMAE 2018
CountrySpain
CityMadrid
Period17/06/1822/06/18
Internet address

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