Determination of wind-driven-rain intensity on building faces
- 31 January 1994
- journal article
- Published by Elsevier BV in Journal of Wind Engineering and Industrial Aerodynamics
- Vol. 51 (1), 55-69
- https://doi.org/10.1016/0167-6105(94)90077-9
Abstract
The weather resistance design of building facades requires adequate knowledge on the wind and rain environment around the building. It is important to know both the wind speed as well as the associated rainfall intensity impinging onto the building faces. However, wind-driven-rain around a building is complicated and it is a topic not well understood. Usually with speed and rain intensity are considered separately and their values for weather resistance design are just guesses based on engineering experience. A method is proposed in the present paper, where wind-driven-rain intensities impinging on building faces are calculated taking into account all the relevant factors such as the interactions between wind, rain and building, and also the joint probability of occurrence of wind and rain. The method comprises the following steps: (a) using computational fluid dynamics method to calculate the flow pattern around a building, (b) raindrop trajectories in the flow field are obtained by solving the force equations, (c) obtain the probability of joint occurrence of wind and rain from the analysis of meteorological records, (d) rainfall intensities on building faces are computed as a function of return period by coupling (b) and (c). The method is applied onto a rectangular building located in Sydney and the extreme wind-driven-rain intensities on various portion of its faces calculated.Keywords
This publication has 6 references indexed in Scilit:
- Simulation of wind-driven-rain around a buildingWind Engineers, JAWE, 1992
- 3-D numerical simulation of airflow around a cubic model by means of the modelJournal of Wind Engineering and Industrial Aerodynamics, 1988
- Extreme wind speeds for various return periods during rainfallJournal of Wind Engineering and Industrial Aerodynamics, 1987
- Computation of wind flows over three-dimensional buildingsJournal of Wind Engineering and Industrial Aerodynamics, 1986
- The size distribution of raindropsQuarterly Journal of the Royal Meteorological Society, 1950
- THE TERMINAL VELOCITY OF FALL FOR WATER DROPLETS IN STAGNANT AIRJournal of Meteorology, 1949