• Flow resistance over heterogeneous roughness made of spanwise-alternating sandpaper strips 

      Frohnapfel, B.; von Deyn, L. H.; Yang, J.; Neuhauser, J.; Stroh, A.; Örlü, Ramis; Gatti, D. (Peer reviewed; Journal article, 2024)
      The Reynolds number dependent flow resistance of heterogeneous rough surfaces is largely unknown at present. The present work provides novel reference data for spanwise-alternating sandpaper strips as one idealised case ...
    • Measurements in a Turbulent Channel Flow by Means of an LDV Profile Sensor 

      Pasch, S.; Leister, R.; Gatti, D.; Örlü, Ramis; Frohnapfel, B.; Kriegseis, J. (Peer reviewed; Journal article, 2023)
      Spatially and temporally resolved velocity measurements in wall-bounded turbulent flows remain a challenge. Contrary to classical laser Doppler velocimetry (LDV) measurements, the laser Doppler velocity profile sensor ...