Minimizing the Impact of Wind-Driven Rain on Buildings through the Use of High Performance Computer Simulations

Printer-friendly versionPDF version

Singapore is subjected to occasionally sudden and unpredictable rain throughout the year. Addition of architectural elements such as awnings, overhangs and louvers, is a commonly adopted method in reducing the penetration of rain into building spaces. Well designed architectural elements can provide comfort, convenience for the occupants of the building, and at the same time, maximize the use of building outdoor spaces. However, the designs of these architectural elements are often based on prediction. This could be inaccurate and might result in further corrective measures being implemented to reduce the severity of rain penetration.

Computational Fluid Dynamics (CFD) is used to optimize the design of such architectural elements, to minimize the extent of rain penetration. To accomplish this, two-dimensional CFD simulations using Lagrangian particle tracking (LPT) are conducted to study the trajectory of rain particles, under different particle diameters and under different wind speeds. This is followed by analyzing the extent of rain penetration of two building developments in Singapore, using local weather data. With the use of CFD technique, design modification on the architectural elements is made, and the severity of rain penetration into building space is effectively reduced.

Author Company: 
Author Name: 
Po Woei Ken
Tan Phay Ping
Tan Hwee Sien