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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Journal ArticleDOI
A grid-independent length scale for large-eddy simulations
TL;DR: The integral length-scale approximation (ILSA) model proposed in this article is a grid-independent, solution-specific length scale model for large-eddy simulations of turbulent flow.
Journal ArticleDOI
A new hybrid turbulence modelling strategy for industrial CFD
Branislav Basara,Suad Jakirlić +1 more
TL;DR: In this paper, a new strategy for turbulence model employment with emphasis on the model's applicability for industrial computational fluid dynamics (CFD) is presented, in which the Reynolds stress and mean rate of strain tensors are coupled via Boussinesq's formula as in the standard k-emodel.
Journal ArticleDOI
Dynamic global model for large eddy simulation of transient flow
TL;DR: Park et al. as mentioned in this paper applied the dynamic subgrid-scale eddy viscosity models with a global model coefficient to large eddy simulation of decaying isotropic turbulence to examine their performances in transient flow.
Journal ArticleDOI
Numerical Investigations of Mean Winds Within Canopies of Regularly Arrayed Cubical Buildings Under Neutral Stability Conditions
TL;DR: In this article, the authors investigated the properties of the spatially-averaged mean quantities used to make these assumptions by performing largeeddy simulations (LES) of the airflow around square and staggered arrays of cubical blocks with the following plan area densities.
Journal ArticleDOI
Sandgrain roughness model for rough walls within Eulerian–Lagrangian predictions of turbulent flows
TL;DR: In this paper, a sandgrain roughness model is proposed for the dispersed phase in which the wall is covered by a densely packed layer of sand grains idealized by mono-disperse spheres.
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.