2D Detached-Eddy Simulation Around Elliptic Airfoil at High Reynolds Number

2007 ◽  
Vol 7 (4) ◽  
pp. 547-552 ◽  
Author(s):  
A. Benazza ◽  
E. Blanco ◽  
M. Abidat
Keyword(s):  
Reynolds Number ◽  
High Reynolds Number ◽  
Detached Eddy Simulation ◽  
Eddy Simulation ◽  
High Reynolds ◽  
Elliptic Airfoil

A Dynamic Procedure for Wall-Modeled Large-Eddy Simulation of High Reynolds Number Flows

2011 ◽  
Author(s):  
Soshi Kawai
Keyword(s):  
Reynolds Number ◽  
Shear Stress ◽  
Wall Shear Stress ◽  
Large Eddy Simulation ◽  
High Reynolds Number ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Wall Shear ◽  
High Reynolds ◽  
Near Wall

This paper addresses the error in large-eddy simulation with wall-modeling (i.e., when the wall shear stress is modeled and the viscous near-wall layer is not resolved): the error in estimating the wall shear stress from a given outer-layer velocity field using auxiliary near-wall RANS equations where convection is not neglected. By considering the behavior of turbulence length scales near a wall, the cause of the errors is diagnosed and solutions that remove the errors are proposed based solidly on physical reasoning. The resulting method is shown to accurately predict equilibrium boundary layers at very high Reynolds number, with both realistic instantaneous fields (without overly elongated unphysical near-wall structures) and accurate statistics (both skin friction and turbulence quantities).

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