Technical Note Layer merging during solidification of supereutectic NH4Cl–H2O system

Simultaneous optical measurement of temperature and velocity fields in solidifying liquids

“…In the past, similar layering phenomena of doublediffusive convection were reported for Hele-Shaw cells (Nishimura et al 1998). For various configurations with cooled sidewalls, layering was reported in the form of a stratified quiescent layer above a strongly convecting layer , layered convection cells (Skudarnov et al 2002) or as a so-called meandering flow regime (Kharicha et al 2013).…”

“…In this paper, we augment this method with a novel implementation of liquid crystal thermometry (LCT) for global temperature field measurements. LCT is an optical temperature measurement technique using encapsulated thermochromic liquid crystals (TLC) whose principal applicability to double-diffusive convection was demonstrated by Nishimura et al (1992Nishimura et al ( , 1994Nishimura et al ( , 1998. In contrast to common point measurements by temperature sensors, i.e., thermistors or thermocouples, LCT is a noninvasive method that can measure whole cross sections of a respective fluid volume.…”

Physic Simulation of Slurry Preparation by Ultrasonic Vibration in Semisolid Metal Processing

“…Effect of vibration on nucleation and growth. NH4Cl-H2O system was successfully used as simulation system for studying many problems in the field of solidification [8][9][10][11]. In this research, 30wt.% NH4Cl-H2O system was prepared by using 99.9% analytically pure NH4Cl solid and distilled water, whose liquidus is 33℃ [12].…”