Flow visualization study of convection during the solidification process of a binary mixture
Conference
Pradeep, N, Skudarnov, PV, Lin, CX et al. (2001). Flow visualization study of convection during the solidification process of a binary mixture
. 2 1131-1142.
Pradeep, N, Skudarnov, PV, Lin, CX et al. (2001). Flow visualization study of convection during the solidification process of a binary mixture
. 2 1131-1142.
The solidification of a binary mixture of ammonium chloride and water was investigated experimentally in a rectangular cavity with two vertical sidewalls of the cavity cooled. The cavity measured 81 × 125 × 104 mm. The effect of the initial concentration of ammonium chloride on the solidification process was investigated. Experiments were carried out under a constant coolant temperature of -20°C. The advanced Particle Image Velocimetry (PIV) technique was used to obtain the convective flow velocity fields during the solidification process, and the data acquisition system was used to measure the temperature field in the chamber. Convective flow fields and temperature distribution in a horizontal direction were investigated for various initial concentrations of ammonium chloride, varied from 5 wt% to 22 wt%. Experimental results showed that using the PIV technique not only allowed acquiring more accurate quantitative information on double-diffusive convection but also gave detailed information about convection that could not be obtained using conventional visualization tools such as shadowgraph.
