Comparison of several computational turbulence models with full-scale measurements of flow around a building

N. G. Wright; G. J. Easom

doi:10.12989/was.1999.2.4.305

Comparison of several computational turbulence models with full-scale measurements of flow around a building

N. G. Wright^*
, G. J. Easom

^*Corresponding author for this work

Civil Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Accurate turbulence modelling is an essential prerequisite for the use of Computational Fluid Dynamics (CFD) in Wind Engineering. At present the most popular turbulence model for general engineering flow problems is the k-ε model. Models such as this are based on the isotropic eddy viscosity concept and have well documented shortcomings (Murakami et al. 1993) for flows encountered in Wind Engineering. This paper presents an objective assessment of several available alternative models. The CFD results for the flow around a full-scale (6 m) three-dimensional surface mounted cube in an atmospheric boundary layer are compared with recently obtained data. Cube orientations normal and skewed at 45° to the incident wind have been analysed at Reynolds number of greater than 10⁶. In addition to turbulence modelling other aspects of the CFD procedure are analysed and their effects are discussed.

Original language	English
Pages (from-to)	305-323
Number of pages	19
Journal	Wind and Structures, An International Journal
Volume	2
Issue number	4
DOIs	https://doi.org/10.12989/was.1999.2.4.305
Publication status	Published - 1999

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
Modelling and Simulation

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10.12989/was.1999.2.4.305

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abstract = "Accurate turbulence modelling is an essential prerequisite for the use of Computational Fluid Dynamics (CFD) in Wind Engineering. At present the most popular turbulence model for general engineering flow problems is the k-ε model. Models such as this are based on the isotropic eddy viscosity concept and have well documented shortcomings (Murakami et al. 1993) for flows encountered in Wind Engineering. This paper presents an objective assessment of several available alternative models. The CFD results for the flow around a full-scale (6 m) three-dimensional surface mounted cube in an atmospheric boundary layer are compared with recently obtained data. Cube orientations normal and skewed at 45° to the incident wind have been analysed at Reynolds number of greater than 106. In addition to turbulence modelling other aspects of the CFD procedure are analysed and their effects are discussed.",

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AB - Accurate turbulence modelling is an essential prerequisite for the use of Computational Fluid Dynamics (CFD) in Wind Engineering. At present the most popular turbulence model for general engineering flow problems is the k-ε model. Models such as this are based on the isotropic eddy viscosity concept and have well documented shortcomings (Murakami et al. 1993) for flows encountered in Wind Engineering. This paper presents an objective assessment of several available alternative models. The CFD results for the flow around a full-scale (6 m) three-dimensional surface mounted cube in an atmospheric boundary layer are compared with recently obtained data. Cube orientations normal and skewed at 45° to the incident wind have been analysed at Reynolds number of greater than 106. In addition to turbulence modelling other aspects of the CFD procedure are analysed and their effects are discussed.

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Comparison of several computational turbulence models with full-scale measurements of flow around a building

Abstract

ASJC Scopus subject areas

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