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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Computational Assessment of the Hazardous Release Dispersion from a Diesel Pool Fire in a Complex Building’s Area
TL;DR: This case study focused on a diesel pool fire accident that occured between an array of nine cubical buildings and found that the urban geometry defined the hazardous gasses dispersion, thus increasing the toxic mass concentration around the buildings.
A multiscale analysis of the urban heat island effect: from city averaged temperatures to the energy demand of individual buildings
TL;DR: In this article, the authors provide a review of research reported in journal publications on this topic until the end of 2015, based on the following characteristics: morphology of the urban area (generic versus real), methodology (with or without validation study), and the studies are categorized by specifying the considered urban settings/locations, simulation equations and models, target parameters and keywords.
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Static downscaling of mesoscale wind conditions into an urban canopy layer by a CFD microscale model
TL;DR: In this article , a static downscaling of the wind from mesoscale to microscale is adopted to evaluate the performance of two CFD microscale models when predicting the flow in a UCL.
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The effect of small embankments of wind speeds
TL;DR: In this paper, full-scale measurements have been made to determine the increase in wind speed over two exposed embankments, one of 23degree slope and 4.7m in height, the other of 24 degree slope and 7.3m in length.
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Evaluación, diseño y propuestas de sistemas de ventilación en la rehabilitación de edificios residenciales españoles. Estudio de caso
TL;DR: In this article, the authors present a methodology, through numeric simulations and climate data, able to solve the seasonal pressure gradient in the building envelope and, once known the airtightness with on-site pressurization tests, the calculation of the ventilation flows in three representative conditions (summer, winter an annual average).
References
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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.
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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.