Superhydrophobic surfaces combine hydrophobic surface chemistry with topological
microfeatures. These surfaces have been shown to provide drag reduction in laminar and
turbulent flows. In this work, direct numerical simulation is used to investigate the drag
reducing performance of superhydrophobic surfaces in turbulent channel flow. Slip
velocities, wall shear stresses, and Reynolds stresses are determined for a variety of
superhydrophobic surface microfeature geometry configurations at friction Reynolds …