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Fig. 72. Partial coalescence at V = 43 cm/sec.
Fig. 73. Rebound at V = 47 cm/sec.
Fig. 74. Rebound and coalescence at V = 55 cm/sec.
Fig. 75. Partial coalescence at angle 48 degrees and rebound at angle 52 degrees
with V = 47 cm/sec.
Fig. 76. Coalescence at V = 131 cm/sec.
Fig. 77. Glancing rebound at V = 131 cm/sec.
Fig. 78. Coalescence at V = 339 cm/sec, angle 1 degree.
Fig. 79. Coalescence at V = 339 cm/sec, angle 24 degrees.
Fig. 80. Direct coalescence collisions at V = 517 cm/sec.
Fig. 81. Coalescence with capture of bubble at V = 517 cm/sec, angle 0 degrees.
Fig. 82. Indirect coalescence at V = 517 cm/sec.
Fig. 83. Relatively direct disruption at V = 517 cm/sec.
Fig. 84. Disruption at V = 517 cm/sec.
The unpublished photographs displayed here are contained in my
dissertation, "Behavior of Water Drops Colliding in Humid Nitrogen", submitted in partial
fulfillment of the requirements for the degree of Doctor of Philosophy (Chemical Engineering)
at the University of Wisconsin, 1970.
"V" is the relative velocity between the drops before collision. The note which appears when your cursor is
moved over a photo page identifies which frames were recorded using still photography. All other frames were
selected from high speed motion pictures. The quantitative research focused on collisions between pairs of drops
with diameters in the following six size groups:
Figs. 15 - 31 0.70 + 0.70 mm
Figs. 32 - 44 0.20 + 0.20 mm
Figs. 45 - 60 0.90 + 0.45 mm
Figs. 61 - 71 0.40 + 0.20 mm
Figs. 72 - 84 0.90 + 0.30 mm
Figs. 85 - 90 0.45 + 0.15 mm
Qualitative work with other collisions was recorded in Figs. 91 - 98.
An article explaining the equipment used in this research, A Device for producing controlled collisions
between pairs of drops, was published by R. W. Park & E. J. Crosby in
Chemical Engineering Science, 1965 20 39-45. A copy of the dissertation is available at
the main library of the University of Wisconsin-Madison.
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