NDLI: Effect of Boundary Conditions and Initial Concentrations on the Solidification of Binary Mixture in Trapezoidal Cavity

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Duggirala, R. K. Sirpal, P. Lin, C. X. Ghenai, C.
Copyright Year	2004
Abstract	The solidification of binary mixture (NH4Cl–H2O) inside a trapezoidal cavity is investigated experimentally in this study. The experiments are carried out in a trapezoidal cavity measuring 65 mm × 130 mm × 150 mm with inclined angle of 69°. Solidification of ammonium chloride occurs on the left inclined copper wall held under constant heat rate condition while the other walls are maintained at adiabatic conditions. Particle image velocimetry was used in this study for visualization of the dynamic field during the solidification process. The temperatures of the solution inside the cavity and the boundary walls were measured by 32 thermocouples during the solidification process. Convective flow field, temperature distribution and frozen layer thickness were obtained for different initial concentrations of ammonium chloride varying from 0 to 19.8 % (sub-eutectic and near-eutectic growth) and various boundary conditions (Tcold = −30 °C to 0 °C). The results obtained in the course of study reveal that (1) the solidification rate is higher during initial stages of the solidification process, (2) the process of solidification is slower with increase in the initial concentration levels of the ammonium chloride and (3) the initial concentration play a significant role in the evolution of convection flow patterns.
Sponsorship	Heat Transfer Division
Starting Page	575
Ending Page	580
Page Count	6
File Format	PDF
ISBN	079184711X
DOI	10.1115/IMECE2004-61743
Volume Number	Heat Transfer, Volume 3
Conference Proceedings	ASME 2004 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2004-11-13
Publisher Place	Anaheim, California, USA
Access Restriction	Subscribed
Subject Keyword	And trapezoidal cavity Binary mixture Double-diffusive convection Particle image velocimetry Solidification Boundary-value problems Cavities Convection Particulate matter
Content Type	Text
Resource Type	Article

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