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AuthorMahgoub, Ahmed Osama
AuthorGhani, Saud
Available date2024-07-21T06:24:20Z
Publication Date2021
Publication NameSustainable Cities and Society
ResourceScopus
Identifierhttp://dx.doi.org/10.1016/j.scs.2020.102648
ISSN22106707
URIhttp://hdl.handle.net/10576/56839
AbstractWindbreaks such as vegetation barriers, fences, and buildings' perforated facades are used in various environmental and wind mitigation applications. Numerical simulation of the airflow through windbreaks is challenging as modeling of the exact geometry needs large computational power. The computational cost can be reduced by modeling the windbreaks using the porous media model. The computational fluid dynamics (CFD) model uses empirical coefficients that need to be determined experimentally. This research develops empirical formulae to determine the needed viscous and inertial loss coefficients as a function of porosity for perforated windbreaks. Particle image velocimetry (PIV) experiments and pressure measurements were performed in a wind tunnel for scaled windbreaks models of porosity ratios ranging from 0.25 to 0.6. CFD simulations were carried out for the exact geometry and for the approximated numerical model. The CFD results of both models were compared against the experimental results. Hence, a correlation between the windbreaks porosity and the needed coefficients to utilize the CFD porous media model was obtained. Compared to exact geometry CFD results, the average velocity and pressure drop values obtained from the porous media model yielded an average error of 10.5% and 12%, respectively.
SponsorThe work presented in this paper was supported by the Aspire Zone Foundation [External grant number QUEX-CENG-ASPIRE-11/12-7 ] and by a grant from the Qatar National Research Fund under its National Priorities Research Program [Award number NPRP11S-0114-180295]. The contents of this work are solely the responsibility of the authors and do not necessarily represent the official views of the Qatar National Research Fund. Open Access funding provided by the Qatar National Library.
Languageen
PublisherElsevier
SubjectCFD
Perforated surface
PIV
Porosity
Porous media models
Pressure drop
Windbreaks
TitleNumerical and experimental investigation of utilizing the porous media model for windbreaks CFD simulation
TypeArticle
Volume Number65
dc.accessType Open Access


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