Optimizing High-Rise Building Layouts to Enhance Urban Wind Flow and Passive Ventilation

This paper investigates the effect of high-rise building layout on desirable wind flow patterns. To investigate these factors in Isfahan city, first, three existing high-rise residential complexes were simulated using ANSYS Fluent software to analyze the airflow patterns under local wind conditions (average speed: ۲.۵ m/s). Then, ۱۵ parametric layout models were developed in three elongation directions (east-west, northwest-southeast, north-south), each with three spacing scenarios based on the ratio of passage width to building height of ۱:۳, ۱:۲, and ۱:۱, which included a total of ۴۵ CFD simulations. The results showed that the location and spacing of high-rise buildings significantly affect the velocity, pressure, and volume of passing and stagnant air when encountering obstacles. In particular, if the distance between buildings is greater than the width of the windward front, the wake area formed behind the buildings becomes shorter. The length of this trailing area is directly related to the total length of the building blocks, and the reduction in wind speed and the level of air stagnation behind the buildings are directly affected by the density and compactness of the design. The least effective design occurs when the buildings are arranged so that they overlap and collectively act as a single, impenetrable barrier to wind flow. The most effective design depends on various factors such as site area, land use, and adjacent buildings.

کلیدواژه ها:

CFD simulations ، Desirable Wind Flow Path ، High-Rise Building Layout ، Isfahan City