仙台市中心部の街路樹がストリートキャニオン内の風環境と空気環境に及ぼす影響の解析

概要

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The effects of roadside trees on flow and diffusion fields within the street canyons in the central part of Sendai city were numerically investigated by CFD analyses coupled with calculations of radiation and conduction. Several cases of analyses were carried out to clarify the effects of arrangements and density of trees, and shapes and elevations of tree crowns. The situation where trees were not planted was also simulated for comparison. In the case without trees, a large recirculation was formed in the street canyon and the air heated by high temperature road surface and contaminated by exhaust gas from automobiles was advected to the area above the sidewalk. This large recirculation did not appear in all cases with roadside trees due to the windbreak effects of trees and the regions with high temperature and high concentration were formed only near the surface of the roads.
一般社団法人日本風工学会の論文