Green urbanism has stimulated more research on the aerodynamics of tree in recent
years. The insight gained in studying wind load on trees would mitigate risk of tree falling and
enable sustainable landscape planning. However, deciphering the effect of wind on trees is a
daunting task because trees come in various species, shapes and sizes. In this study, we aim at
conducting wind tunnel tests on various species of trees, including measuring the respective drag
coefficient and turbulent flow field using a force balance and particle image velocimetry system.
The wind tunnel experiment is conducted using scaled down fractal tree model at 10 and 15 m/s. The
3D-printed tree model is grown based on the data collected on the species-specific tree parameters,
such as the height, trunk diameters, crown box dimensions, etc. In this paper, the wind tunnel
result of Yellow Flame (Peltophorum pterocarpum) is presented. Results show that the drag
coefficient for this inflexible tree model is not sensitive to wind speed. The Reynolds shear
stress and turbulence kinetic energy are observed to be the largest at the top and
bottom of the crown where the velocity gradients are the highest.
License type:
http://creativecommons.org/licenses/by-nc-nd/4.0/
Funding Info:
The authors would like to thank the National Research Foundation of Singapore for the
financial support (NRF2017VSG-AT3DCM001-029).