A collaborative experimental effort employing the minimally perturbed atmospheric surface-layer flow over the salt playa of western Utah has enabled us to map coherence in turbulent boundary layersâ€¦ (More)

Turbulent boundary layer measurements above a smooth wall and sandpaper roughness are presented across a wide range of friction Reynolds numbers, Î´+ 99, and equivalent sand grain roughness Reynoldsâ€¦ (More)

Direct numerical simulations of fully developed turbulent pipe flow that span the Reynolds number range 90 ! Î´+ ! 1000 are used to investigate the evolution of the mean momentum field in and beyondâ€¦ (More)

The problem of discerning key features of steady turbulent flow adjacent to a wall has drawn the attention of some of the most noted fluid dynamicists of all time. Standard examples of such featuresâ€¦ (More)

Physical review. E, Statistical, nonlinear, andâ€¦

2014

The inverse of the von KÃ¡rmÃ¡n constant Îº is the leading coefficient in the equation describing the logarithmic mean velocity profile in wall bounded turbulent flows. Klewicki [J. Fluid Mech. 718, 596â€¦ (More)

The mathematical and physical properties of the Lamb vector divergence are explored. Toward this aim, the instantaneous and mean dynamics of the Lamb vector divergence are examined in severalâ€¦ (More)

The spatial structure of smoothand rough-wall boundary layers is examined spectrally at approximately matched friction Reynolds number (Î´+ â‰ˆ 12 000). For each wall condition, temporal and trueâ€¦ (More)

Data from direct numerical simulations (DNS) of fully-developed turbulent channel flows subjected to a constant surface heat-flux are used to explore the scaling behaviours admitted by the meanâ€¦ (More)

The statistical properties of fully developed planar turbulent Couetteâ€“Poiseuille flow result from the simultaneous imposition of a mean wall shear force together with a mean pressure force. Despiteâ€¦ (More)

A systematic comparison of thermal scaling properties of pipe and channel flows is presented. DNS data are used to compute thermal statistics for friction Reynolds numbers of 180 and 395 and Prandtlâ€¦ (More)