University of Tasmania
Browse

File(s) under permanent embargo

Inline forces and bow wave height on a vertical cylinder moving in waves — Experimental study and CFD validation

journal contribution
posted on 2023-05-21, 03:44 authored by Elhanafi, A, Jonathan DuffyJonathan Duffy, Gregor MacFarlaneGregor MacFarlane, Jonathan BinnsJonathan Binns, Keough, SJ
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.

Funding

Defence Science and Technology Group

History

Publication title

Journal of Fluids and Structures

Volume

107

Pagination

1-21

ISSN

0889-9746

Department/School

Australian Maritime College

Publisher

Academic Press

Place of publication

United Kingdom

Rights statement

© 2021 Elsevier Ltd. All rights reserved.

Repository Status

  • Restricted

Socio-economic Objectives

Maritime

Usage metrics

    University Of Tasmania

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC