| With the rapid economic and social development and the increasingly mature urban construction,people are paying more and more attention to the micro-environment that affects their own health and comfort.Urban micro-environment and urban spatial form have a strong correlation.Only by clearly describing and even quantitatively analyzing urban spatial form can we further propose strategies and suggestions for urban design and architectural design based on its impact on urban micro-environment.The wind environment is an important part of the urban micro-environment.The CFD wind environment simulation is an important method for studying the urban wind environment at present,so it is of great significance to study and analyze its accuracy and reliability.There are currently studies such as comparing CFD simulations wity actual measurements,wind tunnel test results,and so on.However,the current research on CFD simulation mostly stays in the simulation of the ideal model,and the simulation study of the city slice still stays at a relatively shallow level.An important precondition for the study of urban slices is to determine the scope of the wind environment simulation test area.This paper selects three typical urban slices in the main urban area of Nanjing,and uses the Fluent software to carry out simulation calculations in order to expand the target in 150m units in order to determine the boundary range required for the simulation.Then the paper will analyze the relationship between its boundary range and building density,average building height,wind corridors and will establish an experimental model to verify and draw conclusions.In addition,this article will also explore the relationship between the distribution of wind speed values and their spatial patterns in each section of the three slices.Finally,the general rules for the determination of the boundaries of urban section simulation are summarized,and the full-text research is rethought and forecasted. |
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