CFD Numerical Simulation Study On The Influence Of Buildings On Wind Environment In Residential Area

At present,the research scope of wind environment is mainly to study the flow of wind environment inside and outside the building,so as to obtain the influence of wind environment on the use of the building.The main evaluation indexes of wind environment are air velocity distribution,pressure distribution,temperature distribution and particle concentration distribution.At present,with the in-depth research on wind environment,wind environment has gradually become an important consideration in architectural design and has been applied to the actual architectural design.Reasonable wind environment has many advantages: proper natural ventilation can improve human comfort;reasonable wind environment can effectively save energy and improve air quality,thus effectively promoting the development of green cities.It has become very important to design monomer buildings,make good planning for building groups,and ensure that there is a suitable architectural wind environment around buildings and inside buildings.In the flood of promoting the formation of green building cities and the development of low-carbon eco-cities,wind environment can be a very important and critical control factors.Therefore,the research and development of architectural wind environment is of great significance to promote the formation of green buildings.This paper firstly discusses the concept of building wind environment and the mechanism of wind environment's influence on building layout,and then introducing the research status of building wind environment at home and abroad.As an important tool of numerical simulation,the theoretical basis of FLUNT,especially the governing equation of fluid motion,is introduced in this paper.Based on the investigation and research on the layout of a certain urban community and surrounding buildings,the three-dimensional modeling software CATIA was used to conduct reasonable fluid model modeling for the community,and the grid generation software ICEM was used to conduct CFD based fluid model grid generation.Then,FLUENT was used to simulate the wind environment formed by different wind directions blowing through the plot at different grades.Finally,the most representative fractional velocity was selected to simulate the concentration distribution of particulate matter in the community when the air inlet was the source of pollution.The simulation results show that the greater the wind speed,the greater the influence on the wind environment around the building.The influence of building spacing on the surrounding environment of buildings is also significant.In architectural design,the buildings around the walls are too dense,which can easily form large swirls,which can seriously affect the building and air quality.The research ideas,methods and conclusions of this paper can provide some references for the numerical simulation of the wind environment of buildings,and provide some reference for the layout of urban buildings.