Journal ArticleDOI
Appropriate boundary conditions for computational wind engineering models using the k-ϵ turbulence model
Peter Richards,R.P. Hoxey +1 more
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In this paper, velocity and turbulence profiles associated with the k-ϵ turbulence model are proposed which produce homogeneous conditions, and the cospectrum for the Reynolds stress exhibits a characteristics frequency n o ≈ u ∗ / z which is consistent with the suggested profile equations.About:
This article is published in Journal of Wind Engineering and Industrial Aerodynamics.The article was published on 1993-08-01. It has received 1044 citations till now. The article focuses on the topics: K-omega turbulence model & K-epsilon turbulence model.read more
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The Effect of Nonuniform Viscosity on Stagnation Point Pressure
TL;DR: In this paper, the authors examined the effect of viscosity gradients on the stagnation point pressure and showed that at low Reynolds numbers the total pressure decreases in a global sense due to the actions of viscosity, but it may increase locally in regions such as stagnation points.
Pedestrian-level wind conditions around buildings
TL;DR: In this article, a comparative study of wind-tunnel and CFD techniques to determine pedestrian-level wind speeds expressed generally in terms of amplification factors defined as the ratio of local mean wind speeds to mean wind speed at the same position without buildings present is presented.
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The impact of sensor layout on Source Term Estimation in urban neighborhood
Zhenzhe Liu,Xiaofeng Li +1 more
TL;DR: In this paper , the effect of sensor layout on STE performance is analyzed using Computational Fluid Dynamics (CFD) approaches, and the best layout of sensors in the urban neighborhood is determined.
Dissertation
Application de la théorie des similitudes en turbulence à l'interface océan atmosphère
TL;DR: In this paper, le modele RANS (under location uncertainty) is used to obtain a profil de vitesse coherent dans toute la couche limite turbulente.
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Combined Use of Wind-Driven Rain Load and Potential Evaporation to Evaluate Moisture Damage Risk: Case Study on the Parliament Buildings in Ottawa, Canada
Aytaç Kubilay,John Bourcet,Jessica Gravel,Xiaohai Zhou,Travis V. Moore,Michael A. Lacasse,Jan Carmeliet,Dominique Derome +7 more
TL;DR: In this article, the authors performed computational fluid dynamics simulations of wind-driven rain on the Parliament buildings in Ottawa, Canada, and found that the facades of lower towers facing east are the most exposed to WDR, together with the corners of the main tower.
References
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Journal ArticleDOI
The numerical computation of turbulent flows
Brian Launder,D. B. Spalding +1 more
TL;DR: In this paper, the authors present a review of the applicability and applicability of numerical predictions of turbulent flow, and advocate that computational economy, range of applicability, and physical realism are best served by turbulence models in which the magnitudes of two turbulence quantities, the turbulence kinetic energy k and its dissipation rate ϵ, are calculated from transport equations solved simultaneously with those governing the mean flow behaviour.
Characteristics of turbulence in a boundary layer with zero pressure gradient
TL;DR: In this article, the results of an experimental investigation of a turbulent boundary layer with zero pressure gradient are presented and the importance of the region near the wall and the inadequacy of the concept of local isotropy are demonstrated.
Neutrally stratified boundary-layer flow over roughness changes and topography
TL;DR: In this paper, a linear model for neutral surface-layer flow over complex terrain is presented, which makes it possible to make high-resolution computations for an arbitrary distribution of surface roughness and topography.
Journal ArticleDOI
A mixed spectral finite-difference model for neutrally stratified boundary-layer flow over roughness changes and topography
TL;DR: In this paper, a linear model for neutral surface-layer flow over complex terrain is presented, which combines the simplicity and computational efficiency of linear methods with flexibility for closure schemes of finite-difference methods.
Journal ArticleDOI
Simulation of Effect of Wind Barriers on Airflow
TL;DR: In this article, the authors developed a quantitative, theoretical simulation of airflow normal to narrow wind barriers of various porosities and, when possible, verify the results using experimental data, using finite difference methods having a combination of upwind and central difference schemes.