Paper Conference

Proceedings of eSim 2016: 9th Conference of IBPSA-Canada


CFD modeling of wind-driven rain wetting of building facade

Ali Khalilzadeh. Hua Ge, Hoi Dick Ng

Abstract: To investigate the wind-driven rain wetting of façade, several Computational Fluid Dynamics (CFD) models using the traditional Lagrangian Particle Tracking method are developed and validated with wind tunnel measurements for wind flow around the building and field wind-driven rain measurements on a mid-rise sixstory building. The commercial CFD package is used to solve the multiphase flow of wind and rain around the building. A MATLAB code is developed to postprocess the CFD results and calculate the spatial distribution of Wind-Driven Rain (WDR) on façade. This paper investigates the solutions to different turbulence models, k-ε method with wall treatment proposed in the literature, and Standard k-ω, a better turbulent model in terms of near wall wind prediction, and k-ω SST. The effect of upstream mean horizontal velocity models, Log-Law and Power-Law, on the predicted data has also been studied. The comparison between the turbulence models, and inlet velocity profiles, shows a significant reduction in errors favored to Log-Law and Standard k-ω.
Pages: 147 - 157