0

Full Content is available to subscribers

Subscribe/Learn More  >

An Empirical Model of Current Shadow Effect

[+] Author Affiliations
Carlos H. Fucatu, Kazuo Nishimoto

University of São Paulo, São Paulo, SP, Brazil

Paper No. OMAE2004-51432, pp. 769-776; 8 pages
doi:10.1115/OMAE2004-51432
From:
  • ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering
  • 23rd International Conference on Offshore Mechanics and Arctic Engineering, Volume 1, Parts A and B
  • Vancouver, British Columbia, Canada, June 20–25, 2004
  • Conference Sponsors: Ocean, Offshore, and Arctic Engineering Division
  • ISBN: 0-7918-3743-2 | eISBN: 0-7918-3738-6
  • Copyright © 2004 by ASME

abstract

The ship based Floating Production Storage and Offloading system (FPSO) has been largely used in the recent offshore oil exploration. In most of the cases the oil stored in FPSO is offloaded to a shuttle ship that is connected by a hawser in tandem configuration. Although the tandem mooring is a common procedure in the offshore oil industry, there are few publications related to the theme. Among these, the papers concerned with the current flow interference due to the presence of FPSO on upstream of shuttle ship, here called current shadow effect, are even more uncommon. Neither among the commercial simulators that analyze tandem systems there is none that considers the shadow effect of environmental conditions, providing an analysis different from the real world. In previous studies, the authors presented some experimental results showing that the dynamic behaviors of shuttle ships subject to current were strongly influenced by the presence of a FPSO in an upstream position. This phenomenon was expected since the FPSO disturbs the downstream current field acting on the shuttle ship. Observing this fact, a tentative empirical model based on the disturbed current field was developed. The disturbed current field was obtained through a 3D CFD program and the hydrodynamic forces acting on the shuttle ship were computed using the local cross flow method. At that time, a particular experimental case was analyzed and the proposed model showed to be effective. However, during the model evaluation, it was realized that the proposed model wasn’t able to reproduce some experimental cases. This paper presents the last developments on the shadow effect model and a more comprehensive comparison between experimental and numerical results.

Copyright © 2004 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In