### 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.

Original language | English |
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Title of host publication | Flow-induced vibration |

Editors | I. Zolotarev, J. Horacek |

Place of Publication | Prague |

Pages | 693-698 |

Number of pages | 5 |

Publication status | Published - 3 Jul 2008 |

Event | 9th International Conference on Flow-Induced Vibration - Prague Duration: 30 Jun 2008 → 3 Jul 2008 |

### Conference

Conference | 9th International Conference on Flow-Induced Vibration |
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City | Prague |

Period | 30/06/08 → 3/07/08 |

### Keywords

- rain-wind-induced vibration
- circular cylinder
- numerical simulation
- pseudo-spectral method
- thin-film approximation

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## Cite this

Robertson, A. C., Taylor, I. J., Wilson, S. K., Duffy, B. R., & Sullivan, J. M. (2008). A model for the numerical simulation of rivulet evolution on a circular cylinder in an air flow. In I. Zolotarev, & J. Horacek (Eds.),

*Flow-induced vibration*(pp. 693-698).