Numerical investigation of the coupled interaction between an unsteady aerodynamic flow field and a water film coating on a circular cylinder
Taylor, Ian and Robertson, Andrew Colin (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. ISSN 0889-9746 (https://doi.org/10.1016/j.jfluidstructs.2014.11.00...)
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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 rainwind- induced vibration.
ORCID iDs
Taylor, Ian ORCID: https://orcid.org/0000-0002-0082-5542 and Robertson, Andrew Colin;-
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Item type: Article ID code: 50706 Dates: DateEvent1 April 2015Published6 December 2014Published Online6 November 2014AcceptedSubjects: Technology > Mechanical engineering and machinery Department: Faculty of Engineering > Mechanical and Aerospace Engineering Depositing user: Pure Administrator Date deposited: 09 Dec 2014 14:28 Last modified: 27 Sep 2024 00:49 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/50706