Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session D31: Large Eddy Simulations: Modeling
2:30 PM–4:40 PM,
Sunday, November 18, 2018
Georgia World Congress Center
Room: B403
Chair: Anthony Leonard, California Institute of Technology
Abstract ID: BAPS.2018.DFD.D31.1
Abstract: D31.00001 : A novel hybrid two-level and kinetic-eddy simulation model for high Reynolds number wall-bounded turbulent flows*
2:30 PM–2:43 PM
Presenter:
Reetesh Ranjan
(Georgia Institute of Technology)
Authors:
Reetesh Ranjan
(Georgia Institute of Technology)
Achyut Panchal
(Georgia Institute of Technology)
Suresh Menon
(Georgia Institute of Technology)
A novel hybrid model for simulation of wall-bounded turbulent flows is developed by blending the two-level simulation (TLS) method [1] in the near-wall inner region with the kinetic-eddy simulation (KES) method [2] in the outer region. TLS is a multi-scale approach, where a field variable is decomposed into its large-scale (LS) and small-scale (SS) components, and both LS and SS fields are obtained explicitly by employing modeling assumptions for the small-scales. It does not employ the notion of spatial filtering and eddy viscosity. KES is a two-equation based model, where transport equations for the local subgrid kinetic energy and length scale are solved, thus allowing the method to approach to very large-eddy simulation (VLES), LES, and direct numerical simulation (DNS) in the limit of resolution of turbulence length scales corresponding to only large scales, grid size, and fully resolved, respectively. The generalized hybrid formulation is evaluated for its capabilities by simulating fully developed turbulent channel flow at different frictional Reynolds number, and comparing with the reference DNS results.
[1] K. A. Kemenov, S. Menon, J. Comput. Phys., 220 (2006), 290-311.
[2] M. Zaki, S. Menon, L. N. Sankar, J. Aircraft, 47 (2010), 805-811.
*Office of Naval Research
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.D31.1
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