Drag reduction in turbulent flows over superhydrophobic surfaces

By R. Daniello, N. Waterhouse, J. Rothstein. 2009

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On the mechanism of turbulent drag reduction with super-hydrophobic surfaces (2015, background): “This observation has led a number of investigators (Daniello et al. 2009; Martel et al. 2010; Rothstein 2010; Park et al. 2013) to conclude that the bulk of SH DR in turbulent flow arises from mechanisms beyond surface slip, such as modifications to the turbulence dynamics.”
Slip on Superhydrophobic Surfaces (2010, methodology): “Daniello et al. (2009) hypothesize that the maximum drag reduction would approach the fraction of the shear-free interface along the superhydrophobic surface as the Reynolds number increased.”
Application of superhydrophobic coatings as a corrosion barrier : a review (2017, background): “The significant drag reduction of fluid flow over superhydrophobic surfaces is useful for decreasing the required pumping power [29].”
Superhydrophobic surfaces for the reduction of bacterial adhesion (2013, neutral): “Superhydrophobic surfaces are also believed to have other functionalities such as water repellence, broadband anti-reflection, 43,44 anti-icing, 45–47 drag-reduction in fluid flow, 48,49 non-adhesive property 50 and wetting control.”
Characterization of superhydrophobic surfaces for drag reduction in turbulent flow (2018, methodology): “However, we note that the wall shear stresses measured here, for which drag reduction was still observed, are an order of magnitude greater than that of Daniello et al. (2009).”