Rainwater rivulets on a cable subject to windFilets d'eau de pluie sur un câble soumis au vent |
| |
Authors: | Cécile Lemaitre Md. Mahmud Alam Pascal Hémon Emmanuel de Langre Yu Zhou |
| |
Affiliation: | 1. Département de Mécanique, LadHyX, École polytechnique, 91128 Palaiseau, France;2. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong |
| |
Abstract: | Rainwater rivulets appear on inclined cables of cable-stayed bridges when wind and rain occur simultaneously. In a restricted range of parameters this is known to cause vibrations of high amplitudes on the cable. The mechanism underlying this effect is still under debate but the role of rainwater rivulets is certain. We use a standard lubrication model to analyse the dynamics of a water film on a cylinder under the effect of gravity and wind load. A simple criterion is then proposed for the appearance and position of rivulets, where the Froude number is the control parameter. Experiments with several geometries of cylinder covered with water in a wind tunnel show the evolution of the rivulets with the Froude number. Comparison of the prediction by the model with these experimental data shows that the main mechanism of rivulet formation and positioning is captured. To cite this article: C. Lemaitre et al., C. R. Mecanique 334 (2006). |
| |
Keywords: | Vibrations Rain Wind Rivulet Cylinder Vibrations Vent Pluie Filet Cylindre |
本文献已被 ScienceDirect 等数据库收录! |
|