Abstract
Numerical experiments on the micrometeorological, such as momentum, heat and vapor environment, whithin the urban street space with tall building walls (urban street canyon) have been performed by Large Eddy Simulation. The roles of plant as the roadside trees and the effects of their arrangement are investigated.Calculation is devided into two steps: at step 1, only the momentum equations are solved to observe the effect of plant arrangement on the flow field and at step 2 the full equations are solved to observe interacion between the flow and temperature fields.The result shows that the momentum transfer inside and outside the street canyon differs with position of plant, and the moderation of heat environment by plant is observed in all cases.
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