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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Aspects of Inlet Boundary Prescription for a Turbulent Flow Field
TL;DR: In this article, the authors proposed a criterion to select the inlet boundary conditions by treating the boundary as a part of the flow field and using this criterion, any prescribed variation of velocity, turbulence kinetic energy k, and rate of dissipation of kinetic energy e, must satisfy the governing flow field equations at the boundary.
Journal ArticleDOI
Evaluation of numerical simulations of CO2 transport in a city block with field measurements
TL;DR: In this paper, the influence of turbulent kinetic energy dependency on the time interval for the Reynolds decomposition was studied and the combined analysis of measurement and modeling showed the importance of reliable field measurements and CFD simulations with a high spatial resolution to assess transport mechanisms.
Dissertation
Predicting the potential for natural ventilation of buildings in the urban environment.
TL;DR: In this paper, the potential of natural ventilation driven by the combination of wind and buoyancy forces was calculated by coupling the virtual wind tunnel and airflow network models, and the results showed that natural ventilation is a rewarding technique for use in sustainable building design, due to its strengths in health, comfort, energy saving and economy.
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Wind farm layout optimization based on CFD simulations
TL;DR: This work shows the development of a tool for wind farm layout optimization based on computational fluid dynamics (CFD) simulations of the atmospheric wind flow and inter-turbine interference, yielding more accurate results, and should decrease the level of uncertainty in the design of a wind farm.
Structural and motion system dynamic analysis of a two-axes solar tracker under wind action
TL;DR: In this article, a coupling of CFD and structural analyses performed with FLUENT and Abaqus/Standard is proposed to estimate the aerodynamic loading acting on the system, and some relevant aspects such as most critical scenario selection, influence of incoming turbulence in the dynamic response of the structure, and sizing of the motion system (two axes of rotation) in order to overcome the energy loading during positioning of the tracker, were addressed.
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.
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.