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• W2770640971 abstract "Computational Fluid Dynamics (CFD) simulations are widely used in many wind-related urban morphology studies in urban areas, including cross-ventilation. The accuracy of the CFD models, however, is still a challenging issue for accurate prediction of the complex flow behavior around and inside the buildings. The RANS models, although broadly preferred, provide poor results in predicting the cross-ventilation in street canyons. Thus, this study aims to understand and quantify limitations of the steady RANS models for cross-ventilation applications in highly-packed urban areas. To this end, a series of experimentally validated CFD simulations were conducted for a group of buildings, which were arranged in regular and staggered orders with different urban area densities. The improvement possibility of the RANS model accuracy was investigated using a parametric sensitivity study over the closure coefficients, and consequently a series of new closure coefficients were found for urban area densities between 0.25 and 0.4. Furthermore, as an interesting finding of this study, CFD results for urban area densities above 0.4 showed a high discrepancy compared to the expected measurement ranges for surface wind pressure; this implies that the CFD modelling of higher density urban areas should be treated with more caution and thus further studies are required to develop a guideline for such applications." @default.
• W2770640971 created "2017-12-04" @default.
• W2770640971 creator A5025244155 @default.
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• W2770640971 date "2018-02-01" @default.
• W2770640971 modified "2023-10-02" @default.
• W2770640971 title "Improving the CFD modelling of cross-ventilation in highly-packed urban areas" @default.
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• W2770640971 doi "https://doi.org/10.1016/j.scs.2017.11.020" @default.
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