{"title":"Theoretical predictions of raindrop impaction on a slab type building","authors":"G.G. Rodgers , G. Poots , J.K. Page , W.M. Pickering","doi":"10.1016/0007-3628(74)90016-4","DOIUrl":null,"url":null,"abstract":"<div><p>The turbulent air flow around a slab type building has been measured by Wise, Sexton and Lillywhite using a scale model in a wind tunnel. Using their data procedures are developed for calculating raindrop trajectories for droplets having radius <em>r</em> in the range 0 ≦ <em>r</em> ≦ 2500 <em>μ</em> with gradient wind speeds up to 26·8 m/s.</p><p>Grazing trajectories, for fixed droplet size, are obtained and from these the effective collision cross-section of the building is deduced. Employing the droplet size distribution of Best, for a given rainfall intensity, raindrop impaction rates over the building are evaluated. Approximate analytical methods are developed to predict impaction rates and their dependence on the building aspect ratio.</p></div>","PeriodicalId":9442,"journal":{"name":"Building Science","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1974-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0007-3628(74)90016-4","citationCount":"18","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Building Science","FirstCategoryId":"1087","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0007362874900164","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 18
Abstract
The turbulent air flow around a slab type building has been measured by Wise, Sexton and Lillywhite using a scale model in a wind tunnel. Using their data procedures are developed for calculating raindrop trajectories for droplets having radius r in the range 0 ≦ r ≦ 2500 μ with gradient wind speeds up to 26·8 m/s.
Grazing trajectories, for fixed droplet size, are obtained and from these the effective collision cross-section of the building is deduced. Employing the droplet size distribution of Best, for a given rainfall intensity, raindrop impaction rates over the building are evaluated. Approximate analytical methods are developed to predict impaction rates and their dependence on the building aspect ratio.
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