Numerical Simulation of the Aerodynamic Loads on Trees During Storms

Abstract

Fluid-structure interactions for a single tree and a pair of trees with varying spacing subjected to gentle breeze and storm wind conditions were evaluated using Computational Fluid Dynamics (CFD). The generated velocity and pressure fields are then analysed using Finite Element Analysis (FEA) to determine the likelihood of tree damage due to the aerodynamic loads induced by the two wind conditions. It is observed that the pressure difference between the windward and leeward sides of the trees are much larger during the storm condition resulting in greater mechanical stresses and deformation magnitudes experienced by the tree trunks. Increasing the spacing between neighbouring trees resulted in larger aerodynamic loads on the sheltered trees downstream.

CFD Analysis of Slipstreaming and Side Drafting Techniques Concerning Aerodynamic Drag in NASCAR Racing

“…The fluid domain is split into two enclosures (see Figure 2), where the inner enclosure is used as a body of influence with an increased mesh resolution. This numerical model follows simulation techniques and best practices of Gan and Salim [18][19]. The more critical air space surrounding the car and the wake region is programmed to utilise finer tetrahedral meshes, whereas the remaining air in the domain is filled up with coarser hex meshes.…”