Richard J.A.M. Stevens

Professor at the University of Twente

Wind energy · Turbulence · Environmental flows

Publication 31 · Wall-bounded and rotating shear turbulence

Large-eddy simulation study of the logarithmic law for second and higher-order moments in turbulent wall-bounded flow

R.J.A.M. Stevens, M. Wilczek, C. Meneveau, J. Fluid Mech. 757, 888-907 (2014).

Read the article Open-access version (arXiv manuscript)

Main finding

Sufficiently resolved wall-modelled LES reproduces streamwise generalized logarithmic moment laws over an outer interval. The physical scaling of that interval’s lower limit and the non-streamwise laws remain unresolved.

Even-order velocity moments against height and their coefficients against moment order
How to read the figure. Even-order moments of the streamwise velocity against height (a), with the outer interval where the generalised logarithmic law holds marked, and the fitted coefficients against moment order (b). A sufficiently resolved wall-modelled simulation reproduces the logarithmic form for the higher moments as well as the second. The coefficients fall below the predicted line at high order, so the physical lower-limit scaling and the non-streamwise components remain unresolved. Open the full-resolution figure. Figure 8. R.J.A.M. Stevens et al. (2014). No separate licence is stated here; consult the original publication and credited source before reuse.

Why this matters

Why computational resolution can create an apparent physical boundary.

Research context

The method draws on scale-dependent Lagrangian SGS and wall-model LES research cited in Section 2 of the paper.

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