Statistical evidence of hairpin vortex packets in wall turbulence

By Kenneth T. Christensen, Ronald J. Adrian. Journal of Fluid Mechanics, 2001

453 citations recorded by the source corpus.

Subfields: Aerospace Engineering, Computational Mechanics, Environmental Engineering

View Paper: https://www.semanticscholar.org/paper/1c6a069ae9751647d629f57972f2e7ee79a8af41

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Citations in the corpus

Time-resolved evolution of coherent structures in turbulent channels: characterization of eddies and cascades (2012, unknown): “One view is that the buffer layer is the source of attached coherent motions, from where they rise into the outer region (Adrian et al. 2000; Christensen & Adrian 2000; Adrian 2007; Cimarelli, de Angelis & Casciola 2013).”
Turbulence Structure in Rough and Smooth Wall Boundary Layers (2006, background): “Christensen & Adrian (2001) reported 12◦ to 13◦.”
Spatial structure of a turbulent boundary layer with irregular surface roughness (2010, background): “…over a mesh surface (δ/k ≈ 50, δ/ks ≈ 15, k+ = 92, k+s = 331, where k is the geometric height of the roughness and ks is the equivalent sand-grain height) compared to the smooth-wall angle of 10◦–15◦ observed in many studies (Brown & Thomas 1977; Christensen & Adrian 2001; Christensen & Wu 2005).”
Vortical structures in the turbulent boundary layer: a possible route to a universal representation (2008, methodology): “Christensen & Adrian (2001) showed statistical evidence of the presence of hairpin packets in the outer region of turbulent channel flow at Reynolds number Reτ = 547 and 1764 also from PIV measurements.”
Very-large-scale motions in a turbulent boundary layer (2010, background): “Christensen & Adrian (2001) carried out linear stochastic estimations (LSEs) to support the observations of AMT.”
Interactions within the turbulent boundary layer at high Reynolds number (2011, background): “Hairpins have been observed to be organized in larger, ramp-like structures with an inclination angle of about 10◦–13◦ to the wall (e.g. Christensen & Adrian 2001), extending up to the top of the boundary layer.”
Three-dimensional vortex organization in a high-Reynolds-number supersonic turbulent boundary layer (2010, methodology): “For the statistical evaluation of the flow structures linear stochastic estimation (Adrian 1996; Christensen & Adrian 2001) is used to approximate the average velocity field associated to a specified event E at x ′, y ′, z′.”
Large-scale influences in near-wall turbulence (2007, background): “It is well known that the inner-scaled peak in the streamwise turbulence intensity rises with the Reynolds number (DeGraaff & Eaton 2000; Metzger & Klewicki 2001; Metzger et al .”
Characteristics of vortex packets in turbulent boundary layers (2003, methodology): “Recently, Christensen & Adrian (2001), with PIV data in (x, z)planes of channel flow at Reτ = 547 and 1734, used linear stochastic estimation for the conditionally averaged velocity field associated with swirling motion.”
Packet Structure of Surface Eddies in the Atmospheric Boundary Layer (2003, background): “, 2000), channel flow (Christensen and Adrian, 2001), and numerical simulation (Zhou et al.”
Self-similar vortex clusters in the turbulent logarithmic region (2006, background): “Their main conclusions were confirmed by the particle image velocimetry (PIV) experiments performed by Adrian, Meinhart & Tomkins (2000) and by Tomkins & Adrian (2003) in boundary layers up to Reθ = 7705, and by Christensen & Adrian (2001) in channels at friction Reynolds numbers up to Reτ =1734.”
Scaling of the velocity fluctuations in turbulent channels up to Reτ=2003 (2006, background): “The inclination of the upper branches of the isocontours in both figures is approximately 10− 12◦, which is of the order of the angles measured for the velocity correlation in experimental boundary layers (Krogstad & Antonia 1994; Christensen & Adrian 2001).”