Building canopy model for the analysis of urban climate

For the purpose of practical application of CFD for urban climate planning, a building canopy model coupled with CFD was developed, and the effects of building planting were discussed for the decrease of urban heat island phenomena and energy for cooling. In this paper, radiate heat exchange in the building canopy, the drag force model of building walls, the effects of heat released from air conditioning systems are presented. Numerical results show that building planting has possibilities for the reduction of air temperature by 0.4-1.3 degrees C and energy for cooling by 3-25%. (C) 1999 Elsevier Science Ltd. All rights reserved.