Numerical investigation on the effect of building overhang on the flow within idealised two-dimensional street canyon / Muhammad Fatih Ibrahim …[et al.]

Ibrahim, Muhammad Fatih and Mohamad, Mohd Faizal and Ikegaya, Naoki and Abd Razak, Azli (2021) Numerical investigation on the effect of building overhang on the flow within idealised two-dimensional street canyon / Muhammad Fatih Ibrahim …[et al.]. ESTEEM Academic Journal, 17: 11. pp. 67-77. ISSN 2289-4934

Official URL: https://uppp.uitm.edu.my

Abstract

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).

Metadata

Item Type: Article
Creators:
Creators
Email / ID Num.
Ibrahim, Muhammad Fatih
UNSPECIFIED
Mohamad, Mohd Faizal
aizal3744@uitm.edu.my
Ikegaya, Naoki
UNSPECIFIED
Abd Razak, Azli
UNSPECIFIED
Subjects: T Technology > TH Building construction > Building inspection
T Technology > TH Building construction > Building fittings and their installation
T Technology > TH Building construction > Construction equipment in building
Divisions: Universiti Teknologi MARA, Pulau Pinang > Permatang Pauh Campus
Journal or Publication Title: ESTEEM Academic Journal
UiTM Journal Collections: UiTM Journal > ESTEEM Academic Journal (EAJ)
ISSN: 2289-4934
Volume: 17
Page Range: pp. 67-77
Keywords: street canyon, overhang, computational fluid dynamics (CFD)
Date: August 2021
URI: https://ir.uitm.edu.my/id/eprint/50684
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