This file was created by the Typo3 extension sevenpack version 0.7.16 --- Timezone: CEST Creation date: 2023-03-30 Creation time: 23-02-35 --- Number of references 1 article Noack07022020 Flow Turbulence Combustion 2020 105 125 - 157 Wall-resolved large-eddy simulations are performed to study the impact of spanwisetraveling transversal surface waves in zero-pressure gradient turbulent boundary layer flow.Eighty variations of wavelength, period, and amplitude of the space- and time-dependentsinusoidal wall motion are considered for a boundary layer at a momentum thickness basedReynolds number of Re= 1000 . The results show a strong decrease of friction drag of upto 26% and considerable net power saving of up to 10% . However, the highest net powersaving does not occur at the maximum drag reduction. The drag reduction is modeled asa function of the actuation parameters by support vector regression using the LES data.A dependence of the spanwise pressure drag on the wavelength is found. A substantialattenuation of the near-wall turbulence intensity and especially a weakening of the nearwallvelocity streaks are observed. Similarities between the current actuation techniqueand the method of a spanwise oscillating wall without any normal surface deflection arereported. In particular, the generation of a directional spanwise oscillating Stokes layer isfound to be related to skin-friction reduction. Turbulent boundary layer Drag reduction Transversal traveling surface wave Large-eddy simulation ·Active flow control https://link.springer.com/article/10.1007/s10494-020-00110-8 15731987,13866184 https://doi.org/10.1007/s10494-020-00110-8 M.Albers P. S.Meysonnat D.Fernex R.Semaan B. R.Noack W.Schröder