G0501-3-3 Study of Flow around a Windbreak Forest

Abstract

The purpose of this study is to investigate the flow structure of a windbreak forest. Test specimens used in a wind tunnel experiment are two conifers which are evergreen with needle-shaped leaves. We measured the flow around a pair of living trees which have the distance of l=2d and 3d. Reynolds number based on U_∞. and the maximum crown width d of the living tree was 5.8×10^4. The mean streamwise velocity in the wake behind a pair of living trees was decreases more than that behind a single living tree. Moreover, the velocity defect in the case of the distance 2d between conifer A and conifer B is larger than that of in the case of the distance 3d.