Erratum: Particle radial distribution function and relative velocity measurement in turbulence at small particle-pair separations (J. Fluid Mech. (2021) 921 (A16) DOI: 10.1017/jfm.2021.486)

In - 6.3, p. A16-13, the inward RV at contact used to calculate the collision kernel was erroneously reported aswr|r = 2a = 1.2 m s-1 due to a typo in the MATLAB code for this calculation. The correct value iswr|r = 2a- = 0.16 m s-1. Correspondingly, the correct value for the collision kernel at St - 0.75, a - 14 -m, Re- = 324 from the experiment is k(2a) = 3.8 × 104 instead of 2.9 × 105 originally reported. This correction does not impact any of the conclusions of the paper. Note that past direct numerical simulation results are k(2a) = 0.1-10 for St - 0.1-1.0 and Re? = 88?597 (see page A16-14).