Gt. Kim et al., THERMAL-CONVECTION IN PHYSICAL VAPOR TRANSPORT OF MERCUROUS CHLORIDE (HG2CL2) FOR RECTANGULAR ENCLOSURES, Modelling and simulation in materials science and engineering, 5(3), 1997, pp. 289-309
The convective Bow structures in the physical vapour transport process
for mercurous chloride (Hg2Cl2) are investigated for two-dimensional
rectangular enclosures at various aspect ratios (width-to-transport le
ngth) and two different wall boundary conditions: conducting and insul
ating. For a low aspect ratio of 0.124, the core of the flow is domina
ted by a unicellular convective structure at a Rayleigh number 1.51 x
10(4) for conducting walls. For increasing Rayleigh number, the flow f
ield bifurcates to asymmetric multicells. In contrast to conducting wa
ll boundary conditions, the insulating wall boundary conditions tend t
o suppress the formation of secondary cells. As the aspect ratio decre
ases, the Rayleigh number at which transient convective flow arises de
creases.