Assessment of outdoor space’s ventilation efficiency around residential building: Effects of building dimension, separation and orientation

  • YEAR
    You, Wei
    Ding, Wowo
    2016 Conference Papers
    Architectural Science, Landscape and Urban Design
    Conference Papers


This paper probes into the influence of varying lateral spacing and serial lengths in residential buildings on ventilation efficiency in various typical outdoor spaces. To assess ventilation efficiency around residential buildings, purging flow rate (PFR), visitation frequency (VF) and air residence time (TR) are calculated with the computational fluid dynamics (CFD) method. The calculation tool is ANSYS-Fluent. Simulation results show that in comparison with length and lateral spacing, building orientation exerts relatively more effect on ventilation efficiency of outdoor spaces. When the angle between the long facade orientation and wind direction exceeds 30 degrees, the ventilation performance of different domains sees great improvement. Building length has certain influence on ventilation efficiency of outdoor space, especially for the buildings located in the middle of the residential area. The varying range of PFR could reach 16%. Lateral spacing in varying has a relative limited effect on the ventilation efficiency of various outdoor spaces, among which those closer to the varying area generally receive higher effect this way, in the meanwhile dependent on the layout pattern of surrounding buildings.


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