Large Eddy Simulation of the Flow over Low Reynolds Number Air Foil
Final rept. 1 Apr 97-31 Dec 98
MARYLAND UNIV COLLEGE PARK DEPT OF MECHANICAL ENGINEERING
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An a priori study of subgrid-scale models for the unclosed terms in the energy equation is carried out using the flow field obtained from the direct simulation of homogeneous isotropic turbulence. Scale-similar models involve multiple filtering operations to identify the smallest resolved scales and have been shown to be the most active in the interaction with the unresolved subgrid scales SGS. In the present study these models are found to give more accurate prediction of the SGS stresses and heat fluxes than eddy-viscosity and eddy-diffusivity models. as well as improve prediction of the SGS turbulent diffusion, SGS viscous dissipation, and SGS viscous diffusion.
- Fluid Mechanics