Numerical Simulations of Wind and Sound Propagation Through an Idealised Stand of Trees
Numerical finite-difference time-domain fluid models were used to simulate the flow of air and the propagation of sound through an idealised stand of trees in three dimensions. The tree trunks are explicitly resolved by the models whereas the effect of the subgrid crown elements is
neglected. Systematic simulations with varying number density and trunk diameter show that the simulated attenuation by the tree trunks agrees with scattering theory. The application to a 50 m wide, infinitely long belt of trees to study the effects of trees trunks and wind had to be limited
to 100 Hz waves for computational reasons. It turned out that the direct attenuation by the trunks (multiple reflections, scattering) is much larger than the indirect attenuation which is due to the reduction of the vertical wind gradient in the stand and the corresponding reduction of refraction.
Document Type: Research Article
Publication date: 01 September 2003
- Access Key
- Free content
- Partial Free content
- New content
- Open access content
- Partial Open access content
- Subscribed content
- Partial Subscribed content
- Free trial content