Erratum to: Momentum evolution of ejected and entrained fluid during laminar vortex ring formation

Abstract

The text in the original publication following equation (16) reads “. . . λ = 0.39 was computed using Eq. 15 with a and b = c determined as 0.90D and 0.62D, respectively, . . .”, but it should have been rendered as “. . . λ = 0.77 was computed using Eq. 15 with a and b = c determined as 0.62D and 0.90D, respectively, . . .”. As a consequence of transposing the values of the major and minor semi-axes in the ellipsoidal model, the computed value of IA/IT for an ellipsoidal ring (namely 0.23) was too low. The correct value is 0.45, which is only 5% greater than the value of 0.43 determined from the results in Fig. 11. The authors apologize to the readers for this error and would like to thank Dr. Robert Whittlesey for bringing this to their attention.