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The rational large eddy simulation (RLES) model is applied to turbulentchannel flows. This approximate deconvolution model is based on a rational(subdiagonal Pade') approximation of the Fourier transform of the Gaussianfilter and is proposed as an alternative to the gradient (also known as thenonlinear or tensor-diffusivity) model. We used a spectral element code toperform large eddy simulations of incompressible channel flows at Reynoldsnumbers based on the friction velocity and the channel half-width Re{sub tau} =180 and Re{sub tau} = 395. We compared the RLES model with the gradient model.The RLES results showed a clear improvement over those corresponding to thegradient model, comparing well with the fine direct numerical simulation. Forcomparison, we also present results corresponding to a classical subgrid-scaleeddy-viscosity model such as the standard Smagorinsky model.Comment: 31 pages including 15 figure

Large eddy simulation of turbulent channel flows by the rational large eddy simulation model