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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Jet flow over foredunes
TL;DR: In this article, the authors examined computational fluid dynamic (CFD) two-dimensional (2D) modelling of jet flow over a foredune topography and found that the formation of a jet is not dependent on a critical wind speed, and an increase in incident wind velocity does not affect the magnitude of jet flows.
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Verification of CFD pollution dispersion modelling based on experimental data
Juraj Labovský,L’. Jelemenský +1 more
TL;DR: In this article, a comparison of the results obtained by FLADIS field experiments and those of CFD modelling by Fluent 6.3 is provided, where the main attention is focused on the description of the equilibrium ABL (atmospheric boundary layer) as it is an important aspect in dispersion modelling.
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The effect of wind speed and direction and surrounding maize on hybrid ventilation in a dairy cow building in Denmark
TL;DR: In this article, the effect of wind speed and direction and surrounding maize field on the air exchange rate (ACH) and indoor air velocity in a dairy cow building with hybrid ventilation, which combined auto-controlled natural and partial mechanical pit ventilation.
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On the choice between walls and berms for road traffic noise shielding including wind effects
TL;DR: In this paper, a comparison between the road traffic noise shielding provided by 4-m high vertically erected walls and (earth) berms averaged over large zones behind them is made.
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Quantifying the role of urbanization on airflow perturbations and dunefield evolution
TL;DR: In this paper, the impact of urbanization on aeolian dunefield dynamics is investigated in Gran Canaria, Spain, during successive stages of urbanisation at Maspalomas, Spain.
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.
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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.