Journal ArticleDOI
A dynamic subgrid‐scale eddy viscosity model
TLDR
In this article, a new eddy viscosity model is presented which alleviates many of the drawbacks of the existing subgrid-scale stress models, such as the inability to represent correctly with a single universal constant different turbulent fields in rotating or sheared flows, near solid walls, or in transitional regimes.Abstract:
One major drawback of the eddy viscosity subgrid‐scale stress models used in large‐eddy simulations is their inability to represent correctly with a single universal constant different turbulent fields in rotating or sheared flows, near solid walls, or in transitional regimes. In the present work a new eddy viscosity model is presented which alleviates many of these drawbacks. The model coefficient is computed dynamically as the calculation progresses rather than input a priori. The model is based on an algebraic identity between the subgrid‐scale stresses at two different filtered levels and the resolved turbulent stresses. The subgrid‐scale stresses obtained using the proposed model vanish in laminar flow and at a solid boundary, and have the correct asymptotic behavior in the near‐wall region of a turbulent boundary layer. The results of large‐eddy simulations of transitional and turbulent channel flow that use the proposed model are in good agreement with the direct simulation data.read more
Citations
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Journal ArticleDOI
LES of the Sydney piloted spray flame series with the PFGM/ATF approach and different sub-filter models
TL;DR: In this article, large eddy simulations were performed for the Sydney spray flame series, where the gaseous and liquid phases were modeled by an Eulerian/Lagrangian approach and turbulent sub-filter stresses were modeled with Nicoud's sigma model.
Journal ArticleDOI
On the numerical study of contaminant particle concentration in indoor airflow
TL;DR: In this article, the application of three turbulence models (standard k-e, re-normalization group (RNG) k- e and RNG-based large eddy simulation (LES) model to simulate indoor contaminant particle dispersion and concentration distribution in a model room has been investigated.
Journal ArticleDOI
Large eddy simulation of turbulent flow and heat transfer in a channel with one wavy wall
Hang Seok Choi,Kenjiro Suzuki +1 more
TL;DR: In this paper, a large eddy simulation (LES) has been applied to turbulent thermal fields in a channel having one wavy wall for Prandtl number of 0.7.
Journal ArticleDOI
A Review on the Application of the Lattice Boltzmann Method for Turbulent Flow Simulation
TL;DR: A review of previous studies on turbulence in the frame of Lattice Boltzmann method is presented in this paper, where three main groups of turbulence simulation: DNS, LES and RANS methods.
Journal ArticleDOI
Mesh adaptation for large‐eddy simulations in complex geometries
Pierre Benard,Guillaume Balarac,Vincent Moureau,Cécile Dobrzynski,Ghislain Lartigue,Yves D’Angelo +5 more
TL;DR: A numerical strategy for mesh adaptation in high‐performance computing context is proposed by coupling the flow solver, YALES2, and the remeshing library, MMG3D, for massively parallel computations and applied to the simulation of the isothermal flow in a complex meso‐combustor to demonstrate the applicability of the adaptation methodology to complex turbulent flows.
References
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Journal ArticleDOI
General circulation experiments with the primitive equations
TL;DR: In this article, an extended period numerical integration of a baroclinic primitive equation model has been made for the simulation and the study of the dynamics of the atmosphere's general circulation, and the solution corresponding to external gravitational propagation is filtered by requiring the vertically integrated divergence to vanish identically.
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Turbulence statistics in fully developed channel flow at low reynolds number
TL;DR: In this article, a direct numerical simulation of a turbulent channel flow is performed, where the unsteady Navier-Stokes equations are solved numerically at a Reynolds number of 3300, based on the mean centerline velocity and channel half-width, with about 4 million grid points.
Journal ArticleDOI
Renormalization group analysis of turbulence I. Basic theory
Victor Yakhot,Steven A. Orszag +1 more
TL;DR: In this article, a dynamic renormalization group (RNG) method for hydrodynamic turbulence was developed, which uses dynamic scaling and invariance together with iterated perturbation methods, allowing us to evaluate transport coefficients and transport equations for the large scale (slow) modes.
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A numerical study of three-dimensional turbulent channel flow at large Reynolds numbers
TL;DR: In this article, the three-dimensional, primitive equations of motion have been integrated numerically in time for the case of turbulent, plane Poiseuille flow at very large Reynolds numbers.
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On Turbulent Flow Near a Wall
TL;DR: In this paper, the authors defined the distance from wall pipe radius pipe diameter mean local velocity parallel to wall velocity fluctuations parallel and normal to flow mass density coefficient of viscosity shear stress velocity correlation coefficient mixing length universal constant in I = Ky modified universal constant eddy viscosities size of roughness friction factor = 8rw/p V 2