Journal ArticleDOI
Appropriate boundary conditions for computational wind engineering models using the k-ϵ turbulence model
Peter Richards,R.P. Hoxey +1 more
Reads0
Chats0
TLDR
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
Citations
More filters
Journal ArticleDOI
Revisiting the 'Venturi effect' in passage ventilation between two non-parallel buildings
TL;DR: In this article, the authors extended the work of Blocken et al. (2008a) into a more general setup with the building orientation varying from 0° to 180° using CFD simulations and showed that the passage flow is mainly determined by the combination of corner streams.
Journal ArticleDOI
A wind tunnel study of effects of twisted wind flows on the pedestrian-level wind field in an urban environment
TL;DR: Comparisons show a tendency of twisted winds to generate higher wind speeds at the pedestrian level than the conventional wind profile, particularly at locations where the densities of buildings in the neighbourhood are low and hence local wind circulations are significantly modified by the twisted winds.
Journal ArticleDOI
An Investigation of the Quantitative Correlation between Urban Morphology Parameters and Outdoor Ventilation Efficiency Indices
TL;DR: In this paper, two urban morphology parameters, i.e., the floor area ratio (FAR) and the building site coverage (BSC), are investigated to investigate their quantitative correlation with urban ventilation indices.
Journal ArticleDOI
Three-dimensional airflow and sediment transport patterns over barchan dunes
TL;DR: In this paper, the authors measured and modelled airflow dynamics and potential sediment transport across various barchan dune topographies and incident wind conditions using high-resolution 3D ultrasonic anemometers.
Journal ArticleDOI
Pedestrian-level wind speed enhancement in urban street canyons with void decks
Lup Wai Chew,Leslie K. Norford +1 more
TL;DR: In this article, the authors used both experimental and numerical approaches to investigate pedestrian-level wind speed enhancement with void decks (empty spaces at the ground floors) in urban street canyons.
References
More filters
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.