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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Proceedings ArticleDOI
Numerical simulations of wind distributions over very complex terrain
TL;DR: In this paper, a numerical method that predicts the wind flow over highly complex terrain on a small length scale resolution is presented, where the wind speed profile in the first 800 meters of the atmospheric boundary layer with neutral thermal stability is described accurately over a real mountainous terrain covered with a dense forest.
Book ChapterDOI
Uncertainty Quantification for RANS Predictions of Wind Loads on Buildings
Giacomo Lamberti,Catherine Gorle +1 more
TL;DR: In this paper, the uncertainty in the inflow boundary condition is characterized using three uncertain parameters, the reference velocity, roughness length and model orientation, and propagated to the quantities of interest using a nonintrusive polynomial chaos expansion approach.
Journal ArticleDOI
Inflow modeling for wind farm flows in RANS
Journal ArticleDOI
CFD analysis of the effect of uniformly sheared air flow on natural ventilation in building
TL;DR: In this article, ventilation systems in poultry houses play a crucial role in maintaining the required thermal environment inside poultry buildings, and the air velocity and temperature uniformity is essential for maintaining the thermal environment in poultry buildings.
Journal ArticleDOI
Performance Evaluation of the RANS Models in Predicting the Pollutant Concentration Field within a Compact Urban Setting: Effects of the Source Location and Turbulent Schmidt Number
TL;DR: In this paper, the authors used computational fluid dynamics (CFD) to accurately model and predict the dispersion of a passive scalar in the atmospheric wind flow field within an urban setting.
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.