Attributes {
    x {
        String units "m";
        String long_name "x co-ordinate (origin at center of reactor)";
    }
    y {
        String units "m";
        String long_name "y co-ordinate (origin at center of reactor)";
    }
    z {
        String units "m";
        String long_name "z co-ordinate (origin at center of reactor)";
    }
    U_pipe {
        String units "m/s";
        String long_name "inflow velocity pipe";
    }
    u_n {
        String units "m/s";
        String long_name "instantaneous velocity in x-direction";
    }
    w_n {
        String units "m/s";
        String long_name "instantaneous velocity in z-direction";
    }
    time {
        String units "seconds since start measurement";
    }
    n_time {
        String units "-";
        String long_name "number of velocity samples for each LDA measurement";
    }
    u_mean {
        String units "m/s";
        String long_name "time-averaged velocity in x-direction";
    }
    w_mean {
        String units "m/s";
        String long_name "time-averaged velocity in z-direction";
    }
    u_st {
        String units "m/s";
        String long_name "standard deviation velocity in x-direction";
    }
    w_st {
        String units "m/s";
        String long_name "standard deviation velocity in w-direction";
    }
    q_uu {
        String units "N/m^2";
        String long_name "Reynolds-stress uu";
    }
    q_uw {
        String units "N/m^2";
        String long_name "Reynolds-stress uw";
    }
    q_ww {
        String units "N/m^2";
        String long_name "Reynolds-stress ww";
    }
    k {
        String units "m^2/s^2";
        String long_name "Turbulent kinetic energy";
    }
    St {
        String units "-";
        String long_name "Strouhal number based on the frequency of maximum energy in energy-density-spectrum";
    }
    NC_GLOBAL {
        String title "Velocity data of LDA measurements for a flow rate of 2.1 m^3/h in a UV bench-scale reactor";
        String institution "Delft University of Technology, KWR Watercycle Research Institute";
        String reference "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";
        String source "Laser Doppler Anemometry";
        String comment "Inflow pipe diameter: 0.125 m, 4 lamps with a diameter of 0.0476 m";
        String terms_for_use "These data can be used freely for research purposes provided that the following source is acknowledged: Wols et al. (2010).";
        String disclaimer "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.";
        String reference_2 "Wols, B.A. (2010), CFD in drinking water treatment, PhD thesis, Delft University of Technology, DOI: 10.4233/uuid:b1d4405e-a364-4105-ab03-21800b46df5b";
    }
}