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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On the urban geometry generalization for CFD simulation of gas dispersion from chimneys: Comparison with Gaussian plume model
TL;DR: In this paper, the CO2 emission from a natural gas-fueled thermal power plant is simulated using different generic urban patterns and the buildings distribution, the built density and the height of the buildings were analyzed.
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Coupling of physical phenomena in urban microclimate: A model integrating air flow, wind-driven rain, radiation and transport in building materials
TL;DR: In this paper, a fully integrated urban microclimate model is proposed, which solves for wind flow and for the transport of heat and moisture in the air and building materials, including long-wave and short-wave radiative exchange between surfaces and the distribution of wind-driven rain intensity.
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Comparison of Reynolds Averaging Navier-Stokes (RANS) turbulent models in predicting wind pressure on tall buildings
TL;DR: In this article, a detailed comparison of using Reynolds Averaging Navier-Stokes (RANS) approach in predicting wind pressure on a super-tall 406'm slender tower with circular cross-section was presented.
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Computational urban flow predictions with Bayesian inference: Validation with field data
Jorge B. Sousa,Catherine Gorle +1 more
TL;DR: A validation study for a Bayesian inference method that estimates the inflow boundary conditions for Reynolds-averaged Navier-Stokes (RANS) simulations of urban flow by assimilating data from urban sensor measurements indicates that the assimilation approach can consistently improve the predictions.
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Exploration of sustainable building morphologies for effective passive pollutant dispersion within compact urban environments
TL;DR: In this paper, an improved SST k − ω model was first validated against wind and pollutant concentration data from a wind tunnel experiment at Tokyo Polytechnic University, and the turbulence model was then applied to a variety of idealized city morphologies with different building permeabilities and building-height profiles.
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.
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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.