Velocity data of LDA measurements for a flow rate of 2.1 m^3/h in a UV bench-scale reactor Delft University of Technology, KWR Watercycle Research Institute Wols, B.A., Shao, L., Uijttewaal, W.S.J., Hofman, J.A.M.H., Rietveld, L.C. and van Dijk, J.C. (2010), Evaluation of experimental techniques to validate numerical computations of the hydraulics inside a UV bench-scale reactor. Chemical Engineering Science, DOI: 10.1016/j.ces.2010.04.013 Laser Doppler Anemometry Inflow pipe diameter: 0.125 m, 4 lamps with a diameter of 0.0476 m These data can be used freely for research purposes provided that the following source is acknowledged: Wols et al. (2010). This data is made available in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Wols, B.A. (2010), CFD in drinking water treatment, PhD thesis, Delft University of Technology, DOI: 10.4233/uuid:b1d4405e-a364-4105-ab03-21800b46df5b m x co-ordinate (origin at center of reactor) m y co-ordinate (origin at center of reactor) m z co-ordinate (origin at center of reactor) m/s inflow velocity pipe m/s instantaneous velocity in x-direction m/s instantaneous velocity in z-direction seconds since start measurement - number of velocity samples for each LDA measurement m/s time-averaged velocity in x-direction m/s time-averaged velocity in z-direction m/s standard deviation velocity in x-direction m/s standard deviation velocity in w-direction N/m^2 Reynolds-stress uu N/m^2 Reynolds-stress uw N/m^2 Reynolds-stress ww m^2/s^2 Turbulent kinetic energy - Strouhal number based on the frequency of maximum energy in energy-density-spectrum