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Inline forces and bow wave height on a vertical cylinder moving in waves — Experimental study and CFD validation
Citation
Elhanafi, A and Duffy, JT and MacFarlane, GJ and Binns, JR and Keough, SJ, Inline forces and bow wave height on a vertical cylinder moving in waves Experimental study and CFD validation, Journal of Fluids and Structures, 107 pp. 1-21. ISSN 0889-9746 (2021) [Refereed Article]
Copyright Statement
© 2021 Elsevier Ltd. All rights reserved.
DOI: doi:10.1016/j.jfluidstructs.2021.103387
Abstract
The aim of this paper is to investigate the inline force and bow wave height on a
vertical cylinder moving at a constant forward speed in calm water and in regular
waves. A series of physical model tests has been performed to investigate the effect
the waves have on both the inline force and the bow wave height as well as to validate
a Computational Fluid Dynamics (CFD) model that was developed using Caelus open
source code. A stationary mesh was used in the CFD model and a new wave library was
created based on the relaxation zone technique to incorporate the effect of adding a
current with velocity equal to the speed of the moving cylinder while still generating
the targeted wave field. The CFD results were compared to the physical measurements
for the following cases: (1) generation of regular waves and current, (2) inline force and
bow wave height on the cylinder moving in calm water and (3) inline force and bow
wave height on the cylinder moving in regular waves. It was found from the model tests
that both the inline force and bow wave height increased as cylinder speed increased.
The maximum inline force and bow wave height measured on a stationary cylinder
subjected to waves was amplified up to 9.6 and 2.7 times, respectively depending on the
cylinder speed in case 3, which indicated a nonlinear relationship between the variation
in maximum inline force and bow wave height due to wave–current interaction. The
capability of the CFD model has been illustrated by the very good agreement (errors
of about 3.0%) achieved with respect to the experiments for the different conditions of
increasing complexity tested in this study.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | vertical cylinder, experiments, CFD caelus, bow wave height, forces on a vertical cylinder, wave-current interaction |
| Research Division: | Engineering |
| Research Group: | Maritime engineering |
| Research Field: | Ship and platform structures (incl. maritime hydrodynamics) |
| Objective Division: | Defence |
| Objective Group: | Defence |
| Objective Field: | Maritime |
| UTAS Author: | Elhanafi, A (Dr Ahmed Elhanafi) |
| UTAS Author: | Duffy, JT (Associate Professor Jonathan Duffy) |
| UTAS Author: | MacFarlane, GJ (Associate Professor Gregor MacFarlane) |
| UTAS Author: | Binns, JR (Professor Jonathan Binns) |
| ID Code: | 147501 |
| Year Published: | 2021 |
| Deposited By: | NC Maritime Engineering and Hydrodynamics |
| Deposited On: | 2021-11-04 |
| Last Modified: | 2021-12-03 |
| Downloads: | 0 |
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