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The effect of surfactant monolayers on vortex rings formed from an impacting water drop
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3.The present work relates to changes in surface tension due to surfactant monolayers, and how these changes affect drop induced vortex formation. One of the conclusions of Thomson and Newall (Ref. 2) was that the absence of surface tension promotes the formation of vortex rings. Careful reading of their work reveals that their reference to surface tension does not refer to the surface tension between the liquid and the air, but rather the surface tension between the vortex ring fluid and the bulk fluid, which is zero when the drop fluid and bulk fluid are the same, as is the case in the present study.
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23.Note that the axis in this figure differs by a factor of 100 from that presented in Henderson due to an error in Fig. 3(d) of Ref. 21 (personal communication with the author).
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