Environ Fluid Mech https://doi.org/10.1007/s10652-018-9603-y ORIGINAL ARTICLE Modelling of turbulent dispersion for numerical simulation of wind-driven rain on bridges 1 2 3 1,4 • • • Man Liu Sheng Hong Huang Bo Wen Yan Qiu Sheng Li Received: 17 July 2017 / Accepted: 24 May 2018 Springer Science+Business Media B.V., part of Springer Nature 2018 Abstract Wind-driven rain (WDR) is responsible for many potential negative effects on bridges, such as structural cracking, aggregate erosion, steel corrosion and storm water management problems and so on. Hence, accurate evaluations of the WDR effects on bridges are essential to provide solutions for preventing material degradation and improving durability capability of bridges. However, in most previous WDR numerical studies, the turbulent dispersion of raindrops was neglected. In this paper, the turbulent dispersion is integrated into Eulerian multiphase model to investigate the WDR effects on a bridge with rectangular cross-section. Especially, the inﬂuences of the turbulent dispersion are discussed in detail by comparing the WDR simulation results for the cases with and without consideration of the turbulent dispersion in terms of WDR ﬂow ﬁelds, volume fraction, speciﬁc catch ratio, catch ratio, rain loads and aerostatic force coefﬁcients. The results indicate that the turbulent dispersion for
Environmental Fluid Mechanics – Springer Journals
Published: May 30, 2018
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