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  1. Muhammad Fatih bin Ibrahim, Mohd Faizal bin Mohamad, Naoki Ikegaya, Azli Abd Razak
    ESTEEM Academic Journal, 2021;17(2):67-77.
    MyJurnal
    Building overhang is an essential element in the construction of terrace
    houses in Malaysia to protect occupants from the sunlight, car parking, and
    social event purposes. However, there is still a lack of study investigating the
    effect of overhang in a windy area of terrace houses despite its effect on the
    flow modification around the building. Therefore, in this paper, a series of
    computational fluid dynamics (CFD) simulations were performed using
    Reynolds Average Navier Stokes(RANS) equations and renormalization
    group (RNG) k – ε as the turbulence closure model. Simulations were
    conducted on a unity aspect ratio of two-dimensional street canyon
    representing the low-rise terrace house area in a flat roof shape and three
    different overhang conditions. The protruding overhangs were significantly
    modified the in-canyon flow structure as it limited the penetration of the
    above flow into the canyon as compared to the without overhang case. In
    addition, spatially-averaged ? of the turbulent kinetic energy depicted that
    the value decreased within the canyon, demonstrating the independence of
    the overhang location. It is recommended to perform a further study on the
    ventilation performance of the street canyon through evaluation of
    ventilation indices such as ventilation rate, air exchange rate (ACH), and
    pollutant exchange rate (PCH).
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