GROWTH PATTERNS IN THE CONVECTION REGIME

Crystal growth from a solution in which the limit of supersaturation has been reached is now considered. The density differences (ramp rate of /hour) as well as the crystal size (6 mm) are jointly large enough to sustain fluid motion in the beaker from the start. Experiments have been conducted under conditions of a steady plume rising from the crystal. Results for 30 hours of growth have been presented. For times greater than 30 hours, the plume became quite unsteady. Consequently, the projection data of individual view angles became uncorrelated.

Figure 5.31: Schlieren images of the convective field around crystal growing from its aqueous solution as recorded from four different view angles at two different times instants (2 and 30 hours).