Title: On the validity of numerical wind-driven rain simulation on a rectangular low-rise building under various oblique winds
Authors: Abuku, Masaru ×
Blocken, Bert
Nore, Kristine
Thue, Jan Vincent
Carmeliet, Jan
Roels, Staf #
Issue Date: Mar-2009
Publisher: Pergamon Press
Series Title: Building and Environment vol:44 issue:3 pages:621-632
Abstract: Wind-driven rain (WDR) is one of the most important boundary conditions for hygrothermal building
envelope analysis. Although Computational Fluid Dynamics (CFD) simulation of WDR on building
facades has been applied intensively in the past decade, validation is still quite limited, and most
previous validation efforts have focused either on wind directions perpendicular to the facade or on
buildings of complex geometry. This paper addresses CFD simulations of WDR on the west facade of a
simple, rectangular low-rise test building for various oblique winds and CFD validation by comparing
the simulation results with full-scale measurements. It is shown that overall, fairly accurate results can
be obtained, but that the numerical simulations can significantly underestimate the WDR amounts near
the downwind edge of the facade when the wind direction is increasingly oblique. These discrepancies
are at least partly attributed to the very small impact angles of the raindrops at these facade positions
and the resulting inaccuracies in the numerical model.
ISSN: 0360-1323
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Department of Civil Engineering - miscellaneous
Building Physics Section
× corresponding author
# (joint) last author

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