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Determination of rotational damping coefficients of a heavy lift vessel using computational fluid dynamics (CFD)

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Farooq, Umar ULiège
Promotor(s) : Rigo, Philippe ULiège
Academic year : 2022-2023 • Permalink : http://hdl.handle.net/2268.2/18057
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Title : Determination of rotational damping coefficients of a heavy lift vessel using computational fluid dynamics (CFD)
Author : Farooq, Umar ULiège
Advisor(s) : Rigo, Philippe ULiège
Committee's member(s) : Rigo, Philippe ULiège
Language : English
Number of pages : 129
Keywords : [en] Roll Damping
[en] Rotational Damping Coefficients
[en] Roll Damping Coefficients
[en] RANSE
[en] CFD
[en] Roll Decay Test
[en] Free Decay Test
Discipline(s) : Engineering, computing & technology > Mechanical engineering
Target public : Researchers
Professionals of domain
Student
General public
Institution(s) : Université de Liège, Liège, Belgique
University of Rostock, Rostock, Germany
Degree: Master : ingénieur civil mécanicien, à finalité spécialisée en "Advanced Ship Design"
Faculty: Master thesis of the Faculté des Sciences appliquées

Abstract

[en] Heavy lift vessels are used for the transportation of heavy loads and the installation
of offshore structures. These operations require a stable vessel and large operational
windows. For the transportation of these heavy loads, roll motion is of utmost importance
because of the possibility of green water ingress, loads on sea fastening, and submergence
of the overhung parts of the cargo or cargo damage due to high accelerations caused by
the roll motion. This study focuses on the determination of the total non-dimensional
roll damping coefficients.
The roll damping coefficients can be calculated using various techniques including the
potential methods, semi-empirical methods, hybrid methods (potential + semi-empirical
methods), model tests, or RANSE CFD. The potential solvers don’t take into account
the viscous effects during the roll damping but other techniques are used to include these
viscous effects in the potential solvers like hybrid methods. Semi-empirical methods like
Ikeda Method has its limitations of slender hulls and barges which are not comparable
to a heavy lift vessel, and also not including the interaction effect between different components
of the roll damping. Model tests are usually expensive and provide a limitation
of changes in geometry as well. RANSE-CFD is used in this study, to determine the total
non-dimensional roll-damping coefficients accurately including the viscous effects.


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  • Farooq, Umar ULiège Université de Liège > Master ing. civ. méc. (EMSHIP+)

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