Abstract
Large cities cause microclimatic changes, the largest of which is known as the urban Heat Island Effect. The acceleration of urban development has caused variations in microclimatic conditions. Urban geometry and human activities in the urban environment interact with microclimatic parameters (wind speed and direction, air and surface temperature, solar radiation), also transforming the climate of our cities. It is for us to study the impact of climate change on urban environments and to understand the consequences of geometric and morphological factors on microclimatic conditions at the city scale, using tools called Computational Fluid Dynamics (CFD) model, we will try to show how urban geometry, in all its states interacts with microclimatic parameters (solar radiation, wind flows, air and surface temperature). Applied to the agglomeration of ORAN / ALGERIA on an existing urban sector (district HLM ),we will try to show the strong correlation between failures and errors of urban design and the increase and generalization of Heat Island Effect in urban area.
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