DEVELOPMENT OF A 2D NUMERICAL MODEL FOR RAINWATER RUNOFF ON VERTICAL PLANES
Author(s): Bossche, N. van D., Ge, H., Vogelaere, T. D., Pacco, M. and Janssens, A.
Paper category: Conference
Book title: XIII International Conference on Durability of Building Materials and Components - XIII DBMC
Editor(s): Marco Quattrone, Vanderley M. John
Print ISBN: none
Publication year: 2015
Total Pages: 8
Abstract: During rain events, the amount of wind driven rain (WDR) that hits a façade depends on the wind speed, horizontal rainfall intensity, orientation, building surroundings and building geometry. Some parts of the building, typically the corners, will be subjected to higher WDR intensities compared to the rest of the building. Depending on the material properties of the exterior surface of the wall and the WDR intensity, excess water may start running down the wall due to gravity. The type of flow (film flow, straight rivulet, meandering rivulet, droplets) is determined by the amount of runoff, which in turn will affect the flow velocity. In this paper a 2D discrete numerical model was developed to simulate the several flow types on a building surface, depending on the material properties and climatic conditions. The model was validated against measurements reported in literature, and verified against reported data from 1D Nusselt solutions.
Online publication: 2015
Publication Type: full_text
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