Skin-Friction Measurements on Mathematically Generated Roughness in a Turbulent Channel Flow etc15 Tracking Number 69Presentation: Session: Wall-bounded flows 4 Room: Room B Session start: 10:30 Thu 27 Aug 2015 Julio M. Barros barros@usna.edu Affifliation: Department of Mechanical Engineering, United States Naval Academy Michael P. Schultz mschultz@usna.edu Affifliation: Department of Naval Architecture and Ocean Engineering, United States Naval Academy Karen A. Flack flack@usna.edu Affifliation: Department of Mechanical Engineering, United States Naval Academy Topics: - Wall bounded flows Abstract: Engineering systems are affected by surface roughness, however, predicting frictional drag has proven to be challenging. The present work takes a systematic approach by generating and manufacturing surfaces roughness where surface statistics, such as rms, skewness and power-spectral density can be controlled. The frictional drag on these surfaces is measured in a turbulent channel flow facility. |