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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including those from the School of Psychological Sciences & Health - but also papers by researchers based within the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

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A model for the numerical simulation of rivulet evolution on a circular cylinder in an air flow

Robertson, A.C. and Taylor, I.J. and Wilson, S.K. and Duffy, B.R. and Sullivan, J.M. (2008) A model for the numerical simulation of rivulet evolution on a circular cylinder in an air flow. In: Flow-induced vibration. The Academy of Sciences of the Czech Republic, Prague, pp. 693-698. ISBN 9788087012123

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Abstract

The simultaneous occurrence of rain and wind can generate rivulets of water on the cables of cable-stayed bridges. Under certain conditions the interaction of these rivulets with the local aerodynamic field may result in Rain Wind Induced Vibration (RWIV). A method to model this phenomenon computationally is currently under development at the University of Strathclyde. The current paper presents a two-dimensional model for the evolution of a thin film of water on the outer surface of a circular cylinder subject to pressure, shear, surface-tension and gravitational forces. Numerical simulations of the resulting evolution equation using a bespoke pseudo-spectral solver capture the formation of 'rivulets'; the geometry, location and growth rate of which are all in good agreement with previous studies.