A dynamic sub-grid scale model for large eddy simulation of turbulent flows in a lid-driven cubical cavity - 29/11/12
, Faycel Hammami a, Antonio Campo b, Brahim Ben-Beya aBenvenuto su EM|consulte, il riferimento dei professionisti della salute.
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Abstract |
This work undertakes a numerical study of turbulent incompressible flows in lid-driven cubical cavities using Large Eddy Simulation and two sub-grid scale models, i.e., the WALE (Wall-Adapting Local Eddy-viscosity) model and the corresponding dynamic sub-grid model (DSGS). In the process of using DSGS, an optimal value of constant 
of the WALE model was determined for a pre-set Reynolds number 
. The computed numerical results showed very good agreement with those Direct Numerical Simulation (DNS) results and with the experimental measurements found in the literature. Optimal values of 
were determined afterwards with the DSGS model and they were proposed for the analysis of higher Reynolds number turbulent flows. At the end, a power law correlation between 
and Re was proposed for the range 
.
Keywords : Turbulence, Lid-driven cubical cavity, Incompressible fluid, Large eddy simulation, WALE model, Dynamic sub-grid scale
Mappa
Vol 340 - N° 10
P. 721-730 - ottobre 2012 Ritorno al numero
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