Parameters determining the time resolution of wind-driven rain calculations

B.J.E. Blocken, J. Carmeliet

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

An important question in wind-driven rain (WDR) calculations on buildings, either with semi-empirical formulae or with CFD, concerns the required time resolution of the meteorological input data: wind speed, wind direction and horizontal rainfall intensity. Earlier work has indicated that the use of 10-minute input data can provide accurate results, while the use of arithmetically averaged hourly data can give rise to significant underestimations in the calculated WDR amounts. This paper provides an investigation of the parameters that determine the time resolution that should be used in WDR calculations on building facades: (1) the averaging technique; (2) the building geometry and the position at the building facade and (3) the type of the rain event. It is shown that, depending on the parameters involved, hourly and even daily wind and rain input data can provide accurate WDR calculations, while in other situations they can lead to very large errors.
Original languageEnglish
Title of host publicationProceedings of the 12th Symposium for Building Physics, 29-31 March 2007, Dresden, Germany
EditorsP. Häupl, J. Roloff
Place of PublicationDresden, Germany
PublisherTechnische Universität Dresden
Pages609-616
Publication statusPublished - 2007
Event12th Symposium for Building Physics, March 29-31, 2007, Dresden, Germany - Dresden, Germany
Duration: 29 Mar 200731 Mar 2007

Conference

Conference12th Symposium for Building Physics, March 29-31, 2007, Dresden, Germany
CountryGermany
CityDresden
Period29/03/0731/03/07

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