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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CFD assessment on particulate matter filters performance in urban areas
TL;DR: In this paper, the effectiveness of air treatment units in an urban setting is investigated using Computational Fluid Dynamics (CFD), and the mean performance of filters in reducing the uniform background PM levels is found to be approximately 11.4%.
Journal ArticleDOI
Impact of urban environment on Savonius wind turbine performance: A numerical perspective
Riccardo Longo,Riccardo Longo,Patricia Nicastro,Matteo Natalini,Paolo Schito,Riccardo Mereu,Alessandro Parente +6 more
TL;DR: In this paper, computational fluid dynamics (CFD) is employed to evaluate the influence of surrounding buildings on the performance of a roof-mounted, 2-bladed Savonius vertical-axis wind turbine (VAWT).
Journal ArticleDOI
Comparison of OpenFOAM and EllipSys3D for neutral atmospheric flow over complex terrain
Dalibor Cavar,Pierre-Elouan Réthoré,Andreas Bechmann,Niels N. Sørensen,Benjamin Martinez,Frederik Zahle,Jacob Berg,Mark C. Kelly +7 more
TL;DR: In this article, the authors compared OpenFOAM and EllipSys3D in the case of neutral atmospheric flow over terrain using the test cases of Askervein and Bolund hills.
Possible Power Estimation of Down-Regulated Offshore Wind Power Plants.
TL;DR: The PossPOW algorithm as mentioned in this paper uses only 1 Hz turbine data as inputs, namely power, pitch angle, and rotational speed, and is validated in Horns Rev-I, Lillgrund and Thanet offshore wind farms.
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Experimental and numerical investigation of pumping ventilation on the leeward side of a cubic building
TL;DR: In this paper, an experimental and numerical study of pumping ventilation in a three-story cubic building with two leeward openings in its middle floor was performed in the University of Gavle atmospheric-boundary-layer wind tunnel.
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.