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
Decay of magnetohydrodynamic turbulence at low magnetic Reynolds number
TL;DR: In this article, a detailed numerical investigation of homogeneous decaying turbulence in an electrically conducting fluid in the presence of a uniform constant magnetic field is presented. And the authors show that the flow evolution is strongly influenced by nonlinearity and cannot be adequately described by any existing theoretical models.
Proceedings ArticleDOI
Large eddy simulation and turbulence control
TL;DR: In this article, a dynamic subgrid-scale model is proposed to improve the efficiency of turbulence control simulations in the context of drag reduction for plane turbulent channel flow and a receding horizon control framework is also explored that results in increased drag reduction along with improved control distributions.
Journal ArticleDOI
Multiscale simulation of wind field on a long-span bridge site in mountainous area
TL;DR: In this paper, a multiscale coupling strategy is proposed to numerically simulate the wind field at bridge sites in mountainous areas, which mainly focuses on resolving the difficulty of configuring reasonable inlet boundary conditions to achieve the required wind field.
Journal ArticleDOI
Numerical investigation of flow structures around a cylindrical afterbody under supersonic condition
Pratik Das,Ashoke De +1 more
TL;DR: In this paper, a large eddy simulation (LES) with dynamic Smagorinsky model has been applied to numerically investigate the complicated flow structures that evolve in the near wake of a cylindrical after body aligned with a uniform Mach 2.46 flow.
Journal ArticleDOI
Drag Reduction in a Turbulent Channel Flow with Hydrophobic Wall
TL;DR: In this paper, the effect of the hydrophobic surface is considered to be a slip boundary condition on the wall, and this new boundary condition is added to Large Eddy Simulation (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.
Journal ArticleDOI
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.