TY - GEN
T1 - Zonal approaches to wall-layer models for large-eddy simulations
AU - Piomelli, Ugo
AU - Balaras, Elias
AU - Squires, Kyle
AU - Spalart, Philippe R.
PY - 2002/12/1
Y1 - 2002/12/1
N2 - The interaction between inner and outer layer in large-eddy simulations that use approximate boundary conditions is studied. In hybrid R.ANS/LES models a transition layer exists between the RANS and LES regions, that may result in incorrect prediction of the velocity profiles, and errors of up to 15% in the prediction of the skin friction. Several factors affect this transition layer. In general, it is found that the correct prediction of length- and time-scales of the turbulent eddies in the RANS region is important in ensuring correct results, but is not the only factor affecting the results. Modeling errors in the LES region also affect the mean velocity profiles.
AB - The interaction between inner and outer layer in large-eddy simulations that use approximate boundary conditions is studied. In hybrid R.ANS/LES models a transition layer exists between the RANS and LES regions, that may result in incorrect prediction of the velocity profiles, and errors of up to 15% in the prediction of the skin friction. Several factors affect this transition layer. In general, it is found that the correct prediction of length- and time-scales of the turbulent eddies in the RANS region is important in ensuring correct results, but is not the only factor affecting the results. Modeling errors in the LES region also affect the mean velocity profiles.
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M3 - Conference contribution
SN - 9781624101168
T3 - 3rd Theoretical Fluid Mechanics Meeting
BT - 3rd Theoretical Fluid Mechanics Meeting
T2 - 3rd Theoretical Fluid Mechanics Meeting 2002
Y2 - 24 June 2002 through 26 June 2002
ER -