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. 2017 Jul 26;14(132):20170083. doi: 10.1098/rsif.2017.0083

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© 2017 The Author(s)

Published by the Royal Society. All rights reserved.

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Figure 6. — The simulated velocity of the merged drop follows the capillary–inertial scaling (dotted line) in the small-Ohnesorge-number limit. (a) The maximum liquid velocity in the tangential direction as a function of the Buller's drop radius r_B; (b) The non-dimensional peak tangential momentum, , as a function of the Ohnesorge number, . The conditions are the same as those in figure 4 except for the Ohnesorge number which varies with the Buller's drop radius. With pure water as the working fluid, the viscous ‘cutoff’ occurs around r_B = 0.3 μm (Oh = 0.230). At smaller radii, is significantly less than unity. (Online version in colour.)

Inline graphic — The simulated velocity of the merged drop follows the capillary–inertial scaling (dotted line) in the small-Ohnesorge-number limit. (a) The maximum liquid velocity in the tangential direction as a function of the Buller's drop radius r_B; (b) The non-dimensional peak tangential momentum, , as a function of the Ohnesorge number, . The conditions are the same as those in figure 4 except for the Ohnesorge number which varies with the Buller's drop radius. With pure water as the working fluid, the viscous ‘cutoff’ occurs around r_B = 0.3 μm (Oh = 0.230). At smaller radii, is significantly less than unity. (Online version in colour.)