Flow visualization in case of φnp = 0 is
displayed as the superposition of three consecutive images (3/2000 s) for
φnp = 0 for (i)
D/D0 = 1, (ii)
D/D0 = 0.8, and (iii)
D/D0 = 0.7. The scale bar in red is 0.2
mm. (b) The progression of precipitation in
φnp = 0 is laser visualized and
presented at (i) D/D0 = 0.27, (ii)
D/D0 = 0.26, (iii)
D/D0 = 0.24, and (iv)
D/D0 = 0.2 intervals and (v) the final
crystalline form. (c) The front illuminated droplet shape for
φnp = 0 is shown at (i)
D/D0 = 0.25, (ii) the spherical
top-half and crystalline bottom half of the droplet, and (iii) the final crystalline
form. The scale bar in blue is 50 µm. The angle of imaging leads to
the asymmetric appearance of the vortical flow.