Abstract
The spatial variability of the mean flow and turbulence in and above a model canopy is investigated using three-dimensional laser Doppler velocimetry. The mean flow and turbulence are shown to be highly variable in space within the canopy but rapidly converge above the canopy. The coherent variations in the mean flow generate dispersive fluxes contributing almost a fifth to the total flux of momentum, and a greater contribution to the divergence of the flux, within the canopy. The higher-order turbulent statistics are more variable than the mean flow and often strongly correlated in space to variations in the mean flow. The implications of this microscale spatial variability for both field experiments and other laboratory experiments into canopy flow are discussed.
Original language | English |
---|---|
Pages (from-to) | 375-396 |
Number of pages | 22 |
Journal | Boundary-Layer Meteorology |
Volume | 160 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1 Sept 2016 |