A quartz ampoule of inner radius 0.5 cm, height 9 cm, and wall thickness 0.3 cm is filled with HgCdTe of uniform composition (mole fraction CdTe) = 0.2 and initially at uniform temperature 820 C, so the alloy is in its liquid phase. At time t = 0, a constant temperature of 650 C is imposed at the outer surface of the cylinder. The axially symmetric (2-D) simulation uses 20x128 nodes in the alloy and 3x3 nodes in the quartz walls.
The figures show composition and temperature profiles and histories
at the bottom and at mid-height (at half-radius).
The sharp rise of solute near the wall, seen in the upper-left plot, is known as "skin effect" and is observed in experiments.