On the use of microclimatic data for estimating driving rain on buildings.

B.J.E. Blocken, J.E. Carmeliet, H. Hens

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The durability and performance of building envelopes is to a large extent governed by moisture conditions. Driving rain is one of the most important contributors to the total amount of moisture entering a building component exposed to the outside climate. Driving rain is defined as rain that is carried along by the wind and given a horizontal velocity component. Being able to quantify driving rain loads is important to design building envelopes with a satisfactory performance. It is also an essential boundary condition for Heat, Air and Moisture (HAM) transfer analysis of building components. In this paper, a numerical method is used for estimating the spatial and temporal distribution of driving rain loads on buildings from microclimatic measurements of wind speed, wind direction and rainfall intensity. It is applied for a rain event around a low-rise building and the numerical results are compared with measurements. A technique for averaging climatic data to be used in driving rain estimation is proposed and its results are compared with these from currently used averaging techniques.
Original languageEnglish
Title of host publicationInternational building physics conference; tools for design and engineering of buildings, Eindhoven, Sept. 2000
EditorsJ.A. Wisse, N.A. Hendriks, H.L. Schellen, W.H. Spoel, van der
Place of PublicationEindhoven, The Netherlands
Publication statusPublished - 2000
Event1st International Building Physics Conference (IBPC 2000) - Eindhoven, Netherlands
Duration: 18 Sep 200021 Sep 2000
Conference number: 1


Conference1st International Building Physics Conference (IBPC 2000)
Abbreviated titleIBPC 2000
Other"Tools for Design and Engineering of Buildings"


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