The dynamic development of built-up areas observed in the last few decades resulted in strong environmental transformations, especially in terms of climate phenomena. One of the factors which significantly affects the climate and bioclimate of urban areas is wind. Wind can cause discomfort to pedestrians or heat loss in buildings, if the wind speed around buildings is too high. The paper presents two examples of research conducted by the author, related to the issues of wind flow in built-up areas, based on the numerical simulations. The numerical simulations become an increasingly frequently used tool to determine the wind climate. Simulation results provide designers with important information on the influence of the buildings and their layout on the local changes in airflow. They allow testing of alternative solutions and effectiveness of various remedial measures.
An urban form has undeniable influence on microclimatic and human thermal conditions in strongly urbanized areas. In this context, this paper aims at evaluating the ability of the layout of street canyons to provide proper outdoor conditions in the human realm. The research is focused on the assessment of human thermal comfort depending on the configuration of the selected streets, which are located in the main city’s area of the revitalization process. The ENVI-met application, which is widely used in urban climatology, is applied to estimate the impact of the street’s layout on human comfort. Thermal indices such as: SET, PMV, PET and UTCI are implemented to describe conditions prevailing in the street canyons. Furthermore, the results are compared with the literature findings.
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