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Computation of turbulent flows using an extended k-epsilon turbulence closure model
Y.-S. Chen,S.-W. Kim +1 more
- Vol. 88, pp 11969
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TLDR
In this paper, an extended kappa-epsilon turbulence model is proposed and tested with successful results, and an improved transport equation for the rate of dissipation of the turbulent kinetic energy, epsilon, is proposed.Abstract:
An extended kappa-epsilon turbulence model is proposed and tested with successful results. An improved transport equation for the rate of dissipation of the turbulent kinetic energy, epsilon, is proposed. The proposed model gives more effective response to the energy production rate than does the standard kappa-epsilon turbulence model. An extra time scale of the production range is included in the dissipation rate equation. This enables the present model to perform equally well for several turbulent flows with different characteristics, e.g., plane and axisymmetric jets, turbulent boundary layer flow, turbulent flow over a backward-facing step, and a confined turbulent swirling flow. A second-order accurate finite difference boundary layer code and a nearly second-order accurate finite difference elliptic flow solver are used for the present numerical computations.read more
Citations
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Review of computational fluid dynamics for wind turbine wake aerodynamics
TL;DR: In this paper, the state-of-the-art numerical calculation of wind turbine wake aerodynamics is presented, where different computational fluid dynamics techniques for modeling the rotor and the wake are discussed.
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CFD simulation of cross-ventilation for a generic isolated building : impact of computational parameters
TL;DR: In this paper, a series of coupled 3D steady RANS simulations for a generic isolated building are validated based on detailed wind tunnel experiments with Particle Image Velocimetry, and the impact of a wide range of computational parameters is investigated, including the size of the computational domain, the resolution of computational grid, the inlet turbulent kinetic energy profile of the atmospheric boundary layer, the turbulence model, the order of the discretization schemes and the iterative convergence criteria.
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A review on the CFD analysis of urban microclimate
Yasin Toparlar,Yasin Toparlar,Bje Bert Blocken,Bje Bert Blocken,Bino Maiheu,G. J. F. van Heijst +5 more
TL;DR: A review of research reported in journal publications on CFD studies of urban microclimate till the end of 2015 suggests a possible change in this trend as the results from CFD simulations can be linked up with different aspects and thus, CFD can play an important role in transferring urban climate knowledge into engineering and design practice.
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On the accuracy of CFD simulations of cross-ventilation flows for a generic isolated building: Comparison of RANS, LES and experiments
TL;DR: In this article, the authors validate 3D steady Reynolds-averaged Navier-Stokes (RANS) and large eddy simulation (LES) of cross-ventilation in a generic isolated enclosure with wind-tunnel measurements.
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Evaluation of Reynolds stress, k-ε and RNG k-ε turbulence models in street canyon flows using various experimental datasets
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References
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Book
Boundary layer theory
TL;DR: The flow laws of the actual flows at high Reynolds numbers differ considerably from those of the laminar flows treated in the preceding part, denoted as turbulence as discussed by the authors, and the actual flow is very different from that of the Poiseuille flow.
Book
Computational Fluid Mechanics and Heat Transfer
TL;DR: In this paper, a reference record was created on 2005-11-18, modified on 2016-08-08 and used for CFD-based transfert de chaleur.
Mathematical Models of turbulence
Brian Launder,D. B. Spalding +1 more
TL;DR: In this article, turbulence and melange models are used to model models of mathematical models for fluides reference record created on 2005-11-18, modified on 2016-08-08.
The Structure of Turbulence in Fully Developed Pipe Flow
TL;DR: In this paper, a hot-wire anemometer was used to measure the turbulent flow in a 10-inch pipe at speeds of approximately 10 and 100 feet per second, and the results include relevant mean and statistical quantities, such as Reynolds stresses, triple correlations, turbulent dissipation, and energy spectra.