Evaluation of LES models for flow over bluff body from engineering application perspective
S. Vengadesan,A. Nakayama +1 more
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In this article, three SGS stress closure LES models are evaluated for turbulent flow over a square cylinder and it is concluded that a one-equation model for subgrid kinetic energy is the best choice.Abstract:
Three SGS stress closure LES models are evaluated for turbulent flow over a square cylinder. Emphasis is placed on solving engineering-application-type problems on affordable computer resources and within reasonable turnaround times. Results are compared with available experimental data and previously published workshop results. Numerical strategies are kept the same for all the cases. Results are also discussed keeping in view limitations of LES methodology of modelling for practical problems and current developments. It is concluded that a one-equation model for subgrid kinetic energy is the best choice.read more
Citations
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Diffuse interface method for fluid flow and heat transfer in cellular solids
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TL;DR: A coupled diffuse interface lattice Boltzmann fluid flow solver and a diffuse interface heat transfer approach are combined in view of dealing with even more convoluted geometries, incorporating the dynamics of interfaces and complex multiphysics applications.
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An hybrid RANS/LES model for simulation of complex turbulent flow
TL;DR: In this article, a nonlinear eddy viscosity model (NLEVM) and a scalable hybrid Reynolds averaged Navier-Stokes/ large eddy simulation (RANS/LES) strategy are developed to improve the capability of the EVM to simulate complex flows.
Dissertation
Low Reynolds number heat transfer prediction employing large eddy simulation for electronics geometrics.
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Journal ArticleDOI
Hybrid LES — Review and assessment
S. Vengadesan,Perumal Nithiarasu +1 more
TL;DR: In this article, some of the issues involved in performing hybrid LES reported in the recent literature is briefly reviewed, as well as an alternative solu- tion suggested was to combine RANS and LES, which in general referred to as Hybrid LES.
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Improvement of effectiveness of EMHD flow separation control
Hari Sankar,A. M. Pradeep +1 more
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References
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Journal ArticleDOI
Large-eddy simulation: achievements and challenges
TL;DR: In this paper, the present state of the large-eddy simulation (LES) technique is discussed, and results of state-of-the-art calculations are presented to highlight the response of the subgrid-scale models to important features of the flow field.
Journal ArticleDOI
A Statistically-Derived Subgrid-Scale Kinetic Energy Model for the Large-Eddy Simulation of Turbulent Flows
Akira Yoshizawa,Kiyosi Horiuti +1 more
TL;DR: In this paper, a subgrid-scale (SGS) kinetic energy model for the large-eddy simulation (LES) of turbulent flows is constructed with the aid of the statistical results obtained from the two-scale direct-interaction approximation.
Journal ArticleDOI
Large-eddy simulation of the turbulent mixing layer
TL;DR: In this paper, six subgrid models for the turbulent stress tensor are tested by conducting large-eddy simulations (LES) of the weakly compressible temporal mixing layer: the Smagorinsky, similarity, gradient, dynamic eddy-viscosity, dynamic mixed and dynamic Clark models.
Journal ArticleDOI
An approach to wall modeling in large-eddy simulations
TL;DR: In this paper, a large-eddy simulation with friction Reynolds number Reτ as high as 80'000 is treated by largeeddy simulation at a moderate cost, using the subgrid-scale model designed for detached-eddy simulations.
Journal ArticleDOI
The effect of turbulence on the surface pressure field of a square prism
TL;DR: In this article, the mean and fluctuating pressure field acting on a two-dimensional square cylinder in uniform and turbulent flows was measured and the addition of turbulence to the flow was shown to raise the base pressure and reduce the drag of the body.