Wind Field Characteristics And Their Impact On The Heat Island Effect In Cities Along The River In Anhui Province

The rapid development of China's urbanization today has resulted in an increase in urban land use,greater human interference with the environment,and a dense urban building stock,all of which have altered the impact of urban heat and dynamics,resulting in a slew of urban environmental issues.The resultant heat island effect has created a slew of issues in the urban environment that can't be overlooked,and urban heat islands,as well as carbon neutrality and carbon peaking,' are currently hot research topics.The urban heat island effect is created by a large number of people and cars in the city releasing heat that collects above the metropolis.The wind speed has the greatest impact on the urban heat island effect of all the natural elements.Wind is created by the flow of air,therefore it is vital to consider both wind direction and wind speed when measuring wind.The wind field is the state of wind flow and wind speed in a given regional area.The quality of the outdoor thermal and wind environment is directly influenced by the wind environment.As a result,establishing a comfortable outdoor wind environment is not only a necessity for people's life,but also for technological advancement.The outdoor wind fields of cities along the river in Anhui province(Ma'anshan,Wuhu,Tongling,Chizhou,and Anqing)are studied in this research.The features of their wind fields are summarised using the method of average meteorological years,followed by CFD numerical modelling of the wind-heat environment of typical building clusters in the five cities and a solution to lessen the heat island effect.The following is a summary of the research:First,meteorological data from the five cities is compiled,and the typical meteorological year of each city is determined using the method specified in the specification;second,wind rose diagrams are drawn using the typical meteorological year,and the dominant wind direction,average wind speed of the dominant wind direction,maximum wind frequency wind direction,and average wind speed of this wind direction are analized;third,the principle of CFD and the controlling equations of the mathematical model used to calculate the wind-heat environment are introduced,and the establishment of a physical model,setting of boundary conditions,and grid division are elaborated to provide the theoretical basis and corresponding methods for the study;fourth,since the topography of the cities along the river is mostly plain,this paper selects five cities with representative riverside residential building complexes that actually exist,takes a typical commercial building as the research object,places it within the building complex,uses Rhino and Sketch Up software to establish a three-dimensional model,and then uses CFD numerical simulation based on the determined meteorological conditions of a typical meteorological year to simulate and compare the wind-heat environment of the building in a typical meteorological year and 1981 by analyzing the three-dimensional distribution of wind speed,airflow organization and temperature in the study area;subsequently,based on the determined meteorological conditions in a typical meteorological year,the wind-heat environment of the building in a typical meteorological year and 1981 is simulated and compared and studied by analyzing the 3D distribution of wind speed,airflow organization and temperature in the study area using CFD numerical simulation method;finally,the wind and heat environment simulation results are combined to propose a solution to mitigate the heat island effect,which is then simulated and calculated to ensure feasibility.Finally,additional recommendations are made to improve the wind and heat environment and mitigate the urban heat island effect.The paper investigates the wind field characteristics of a typical meteorological year in a riverine city in Anhui province,and simulates the local wind-heat environment using CFD numerical simulation techniques to propose a scientific improvement scheme,which serves as a reference for the study of mitigating the urban heat island effect,as well as data support for future wind environment modelling.This is hoped to give scientific guidance for local urban planning,maximise the suppression of ecological deterioration caused by urbanisation,and promote energy-efficient and low-carbon sustainable development.Figure [100] table [35] reference [65]...