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Numerical investigation of the coupled interaction between an unsteady aerodynamic flow field and a water film coating on a circular cylinder

Taylor, I.J. and Robertson, A.C. (2015) Numerical investigation of the coupled interaction between an unsteady aerodynamic flow field and a water film coating on a circular cylinder. Journal of Fluids and Structures, 54, pp. 312-331. (doi: 10.1016/j.jfluidstructs.2014.11.008)

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Abstract

Rain-wind induced vibration is an aeroelastic phenomenon that occurs on the inclined cables of cable-stayed bridges and arises due to the interaction between the unsteady wind loading and the formation of water rivulets on the cable surface. A new numerical method has been developed at the University of Strathclyde to simulate the influence of the external flow field on the rivulet dynamics and vice versa. The approach is to couple a Discrete Vortex Method solver to determine the external flow field and unsteady aerodynamic loading, and a pseudo-spectral solver based on lubrication theory to model the evolution and growth of the water rivulets on the cable surface under external loading. Results of this coupled model are presented, to provide detailed information on the development of water rivulets and their interaction with the aerodynamic field. In particular, the effect of the initial water film thickness and the angle of attack in plane on the resulting rivulets are investigated. The results are consistent with previous full scale and experimental observations with rivulets forming on the upper surface of the cable only in configurations where rain-wind induced vibration has been observed. Additionally, the thickness of the lower rivulet is found to be self-limiting in all configurations. The results demonstrate that the model can be used to enhance the understanding of the underlying physical mechanisms of rain-wind-induced vibration.

Item Type:	Articles
Keywords:	Rain-wind induced vibration, cables, computational wind engineering, rivulet.
Status:	Published
Refereed:	Yes
Glasgow Author(s) Enlighten ID:	Taylor, Dr Ian
Authors:	Taylor, I.J., and Robertson, A.C.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
College/School:	College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity
Journal Name:	Journal of Fluids and Structures
Journal Abbr.:	J Fluid Struct
Publisher:	Elsevier
ISSN:	0889-9746
ISSN (Online):	1095-8622
Published Online:	06 December 2014
Copyright Holders:	Copyright © 2014 Elsevier Ltd.
First Published:	First published in Journal of Fluids and Structures 54: 312-331
Publisher Policy:	Reproduced in accordance with the publisher copyright policy

University Staff: Request a correction | Enlighten Editors: Update this record

References

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Deposit and Record Details

ID Code:	135676
Depositing User:	Dr Ian Taylor
Datestamp:	30 Jan 2017 12:55
Last Modified:	01 Feb 2017 09:29
Date of acceptance:	6 November 2014
Date of first online publication:	6 December 2014
Date Deposited:	30 January 2017
Data Availability Statement:	No