Open AccessEffect of Opening Size on Wind-Driven Cross Ventilation
Author(s) -
Lip Kean Moey,
Yao Horng Sing,
Vin Cent Tai,
Tze Fong Go,
Yaw Yoong Sia
Publication year - 2021
Publication title -
international journal of integrated engineering/international journal of integrated engineering
Language(s) - English
Resource type - Journals
eISSN - 2600-7916
pISSN - 2229-838X
DOI - 10.30880/ijie.2020.13.06.009
Subject(s) - ventilation (architecture) , mechanics , airflow , overall pressure ratio , materials science , reynolds averaged navier–stokes equations , volumetric flow rate , computational fluid dynamics , environmental science , meteorology , physics , thermodynamics , gas compressor
The opening size is important to the ventilation of building because various opening sizes affects the ventilation performance for building. Therefore, the objective of this study is to investigate the effect of opening size on indoor airflow characteristics of naturally ventilated building model. The numerical simulation with steady RANS equations was used. A total of six different opening ratios, namely 4:1, 2:1, 1:1, 1:2, 4:9 and 1:4 were considered in this study. The results of mesh independence study and model validation were also in good agreement with previous study. The simulation results show that velocity and pressure of the indoor air, ventilation rate, and pressure coefficient are highly dependent on the opening ratio. The velocity and pressure contour indicate that the lower the opening ratio, the higher the velocity and subsequently lower pressure inside the building. In addition, the pressure coefficient and ventilation rate are also increased as the opening ratio decreases. Besides, the results indicate that percentage increase in ventilation rate of opening ratio 4:1 and 2:1, 2:1 and 1:1, and 1:1 and 1:2 is higher than those of opening ratio for 1:2 and 4:9, 4:9 and 1:4. The study concluded that pairing a large outlet and small inlet leads to increase in better ventilation rate for building.