Journal ArticleDOI
A proposed modification of the Germano subgrid‐scale closure method
TLDR
In this paper, the subgrid-scale closure method developed by Germano et al. is modified by use of a least squares technique to minimize the difference between the closure assumption and the resolved stresses.Abstract:
The subgrid‐scale closure method developed by Germano et al. is modified by use of a least squares technique to minimize the difference between the closure assumption and the resolved stresses. This modification removes a source of singularity and is believed to improve the method’s applicability.read more
Citations
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Large Eddy simulation of turbulent mixed convection in a 3D ventilated cavity: Comparison with existing data
TL;DR: In this article, the authors considered the mixed convection airflow encountered in a 3D anisothermal cavity ventilated with supply and exhaust slots under stable thermal stratification, and they used an LES approach associated with a subgrid diffusivity model for natural convection airflows.
Posted Content
Alpha-modeling strategy for LES of turbulent mixing
TL;DR: In this article, a new subgrid parameterization of the turbulent stress tensor in large-eddy simulation (LES) is derived, which contains the filtered nonlinear gradient model as well as a model which represents Leray-regularization.
Journal ArticleDOI
Numerical investigation of flow around cylinder at Reynolds number = 3900 with large eddy simulation technique: Effect of spanwise length and mesh resolution:
Niaz B. Khan,Niaz B. Khan,Zainah Ibrahim,Ahmad Badarudin Bin Mohamad Badry,Mohammed Jameel,Muhammad Faisal Javed +5 more
TL;DR: In this paper, flow around a cylinder at a Reynolds number of 3900 was studied using large eddy simulation with ICEM CFD and Fluent tools for meshing and analysis, respectively.
Journal ArticleDOI
Prediction of the pressure distribution on a cubical building with implicit LES
Demir Ali Köse,Erik Dick +1 more
TL;DR: In this article, the authors present a numerical study of the flow around a cubical building in an atmospheric boundary layer, where different types of turbulence models, steady state RANS, hybrid RANS/LES and LES, are used.
Journal ArticleDOI
A priori and a posteriori investigations for developing large eddy simulations of multi-species turbulent mixing under high-pressure conditions
Giulio Borghesi,Josette Bellan +1 more
TL;DR: In this article, a Direct Numerical Simulation (DNS) database was created to represent mixing of species under high-pressure conditions, and the morphology of large-scale flow structures was examined and analyzed for the purpose of modeling some of the unclosed terms that appear in the LES equations.
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.
Journal ArticleDOI
A dynamic subgrid‐scale eddy viscosity model
TL;DR: 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.
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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.
Journal ArticleDOI
A dynamic subgrid‐scale model for compressible turbulence and scalar transport
TL;DR: Germano et al. as discussed by the authors generalized the dynamic subgrid-scale (SGS) model for the large eddy simulation (LES) of compressible flows and transport of a scalar.
On the application of the eddy viscosity concept in the Inertial sub-range of turbulence
TL;DR: In this paper, it was shown that an eddy diffusion hypothesis for use in numerical solutions of turbulent flow problems is consistent with the existence of an inertial subrange at the smallest resolvable scale of the numerical model.