The influence of morphological characteristics of green patch on its surrounding thermal environment

In order to explore the influence of morphological characteristics of green patches on its surrounding thermal environment, the remote sensing image data of Taiyuan City was used as the basic data source, and the temperature field under the influence of morphological characteristics of green patches was simulated by CFD technique. The dimensionless parameter of relative temperature change rate was introduced as the index of thermal environment effect. From the existing shape index reflecting the patch characteristics, the indicators of the green patch affecting the surrounding thermal environment were screened out, and the corresponding quantitative relationship between them was established. Based on the statistical analysis of patch shape index and thermal environment effect index, it is pointed out that the deviation degree for equivalent perimeter of patch is positively correlated with the relative change rate of temperature reflecting thermal environment effect. Meanwhile, the smaller area of green space can be used to improve local microclimate. The introduction of CFD technology into the study of urban thermal environment provides a basis for exploring the key parameters to improve the ecological environment benefits of urban green space and determining the shape control index of patch in green space planning and design. On the other hand, the simulation function of CFD technology is used to optimize green space design, which has better significance to guide production practice.