Validation of wind-driven rain simulation on a building for oblique winds

M. Abuku, B.J.E. Blocken, K. Nore, J.V. Thue, J.E. Carmeliet, S. Roels

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

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 fo-cused 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.
Original languageEnglish
Title of host publicationProceedings of the 4th International Conference on Advances in Wind and Structures (AWAS08), 29-31 May 2008, Jeju, Korea
EditorsCK Choi, JD Holmes, YD Kim, HG Kwak
Place of PublicationKorea
PublisherTechno Press
ISBN (Print)978-89-89693-23-9
Publication statusPublished - 2008
Event4th International Conference on Advances in Wind and Structures,28-30 May 2008, Jeju Island, Korea - Jeju Island, Korea, Republic of
Duration: 28 May 200830 May 2008

Conference

Conference4th International Conference on Advances in Wind and Structures,28-30 May 2008, Jeju Island, Korea
Abbreviated titleAWAS'08
CountryKorea, Republic of
CityJeju Island
Period28/05/0830/05/08

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  • Cite this

    Abuku, M., Blocken, B. J. E., Nore, K., Thue, J. V., Carmeliet, J. E., & Roels, S. (2008). Validation of wind-driven rain simulation on a building for oblique winds. In CK. Choi, JD. Holmes, YD. Kim, & HG. Kwak (Eds.), Proceedings of the 4th International Conference on Advances in Wind and Structures (AWAS08), 29-31 May 2008, Jeju, Korea Techno Press.