Behavior of Hydrodynamic Force Acting on Lateral Motion Ships in Extreme Shallow Water

The behavior of hydrodynamic forces acting on a ship at lateral motion was investigated. Force measurement in towing tank and numerical simulation on viscous flow field were made, and correlations of hydrodynamic forces with flow field around ships were examined. A large flow pattern change at extre...

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Bibliographic Details
Published inJournal of the Japan Society of Naval Architects and Ocean Engineers Vol. 22; pp. 67 - 73
Main Authors KATSUI, Tokihiro, NISHIO, Shigeru, OZAKI, Runa, NAKAMURA, Shino
Format Journal Article
LanguageEnglish
Japanese
Published Tokyo The Japan Society of Naval Architects and Ocean Engineers 2015
Japan Science and Technology Agency
Subjects
Computer simulation
Flow pattern
Force measurement
Hydrodynamics
Mathematical models
Shallow water
Ships
Towing
Towing tanks
Viscous flow
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Summary:The behavior of hydrodynamic forces acting on a ship at lateral motion was investigated. Force measurement in towing tank and numerical simulation on viscous flow field were made, and correlations of hydrodynamic forces with flow field around ships were examined. A large flow pattern change at extreme shallow water case such as H/d<1.20 was observed in model scale, and it causes serious characteristics change of lateral force. Present characteristics change could be caused by the pre ssure loss at the gap between sea bottom and ship bottom, which may be referred by ‘retaining effect’, and that generates the upstream flow pattern and separation pattern change.
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ISSN:1880-3717
1881-1760
DOI:10.2534/jjasnaoe.22.67