Figure 1.1: Successive images of a 9.4mPa s silicone oil drop of diameter D = 3.3mm impacting a glass slide at V = 3.4m s−1 (Re = 1100, We = 1600) at atmospheric pressure. Images (a)-(d) show the drop splashing on a smooth glass slide at times t = 0.18, 0.33, 1.2 and 2.3ms. The red arrow in (b) points to the newly-created thin sheet that grows in subsequent images. Images (e)-(f) show the corresponding frames of a drop impacting a slide that is comprised of a rough (right, dark) and a smooth (left, bright) region. Thin-sheet formation and splashing take place only in the smooth region.
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