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      Influence of urban environment on wind-driven rain load on building facades

      1 ,   2 , 3 , 2
      1st International Conference on Moisture in Buildings 2021 (ICMB21)
      28-29 June 2021
      wind-driven rain load, urban environment, CFD simulation
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            Abstract

            Wind-driven rain (WDR) is the largest moisture source that influences the hygrothermal performance of building envelopes. Accurate estimation of WDR load on building facades is very important for hygrothermal analysis of building envelopes. In this study, we use CFD models to investigate the influence of urban environment on WDR load and distribution on the building facades. The case study is a historical building located in the city center of Zurich. There is a very large difference between the WDR load and distribution on the building façade of the historical building when located in the urban environment or in the open field. For the same building, the WDR load can be five times larger in the open field than when located in an urban environment. Furthermore, the distribution pattern of WDR is also significantly changed by the presence of an urban environment. The decrease in WDR for the building in an urban environment is mainly due the reduction of the wind flow velocity especially in front of the historical building. Wind flow direction is significantly changed in the urban environment. Furthermore, compared to the CFD method, the empirical methods could be very inaccurate.

            Content

            Author and article information

            Conference
            14 May 2021
            Affiliations
            [1 ] Chair of Building Physics, ETH Zurich & Laboratory of Multiscale Studies in Building Physics
            [2 ] Chair of Building Physics, ETH Zurich
            [3 ] Department of Civil and Building Engineering, Université de Sherbrooke
            Article
            10.14293/ICMB210071
            418ce5dd-b9c7-418e-b77e-7d01b4f89353
            The Author(s)

            Published under Creative Commons Attribution 4.0 International ( CC BY 4.0). Users are allowed to share (copy and redistribute the material in any medium or format) and adapt (remix, transform, and build upon the material for any purpose, even commercially), as long as the authors and the publisher are explicitly identified and properly acknowledged as the original source.

            1st International Conference on Moisture in Buildings 2021
            ICMB21
            Online
            28-29 June 2021
            History
            Product

            ScienceOpen


            The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.
            Engineering

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