NDLI: Double diffusive convection during solidification of ammonium chloride - water (NH4CL-H20) mixture in a trapezoidal cavity

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Double diffusive convection during solidification of ammonium chloride - water (NH4CL-H20) mixture in a trapezoidal cavity

Content Provider	Semantic Scholar
Author	Duggirala, Ravi K.
Copyright Year	2004
Abstract	OF THE THESIS DOUBLE DIFFUSIVE CONVECTION DURING SOLIDIFICATION OF AMMONIUM CHLORIDE WATER (NH4 CI2O) MIXTURE IN A TRAPEZOIDAL CAVITY by Ravi Kumar Duggirala Florida International University, 2004 Miami, Florida Professor Yong X. Tao, Major Professor The effect of the initial concentration of ammonium chloride (sub eutectic: C < 19.8 wt. % and eutectic C,= 19.8 wt. %) and boundary temperatures (Told = -30 C to -10 C) on the solidification process is examined. Particle Image Velocimetry (PIV) is used in this study to measure the velocity fields in the melt during the solidification process. The distributions of temperatures at discrete locations in the solution and the boundary walls were measured. This study focuses on the solidification of an ammonium chloride-water (NH 4ClH20) solution in a trapezoidal cavity with one and two inclined cooling walls. The thermosolutal convective flow strongly influenced the rate of freezing. An increase in thermal driving force increased the rate of freezing. Increased initial concentration retarded the freezing process and primarily affected the structure of the solid and mush regions. The results of this study will contribute in understanding the phenomena and bridge the gap between the engineering aspect and physics background for the dynamics of solid phase formation during castings, ingots, and polymerization.
File Format	PDF HTM / HTML
DOI	10.25148/etd.FI15101238
Alternate Webpage(s)	https://digitalcommons.fiu.edu/cgi/viewcontent.cgi?article=4387&context=etd&httpsredir=1&referer=
Alternate Webpage(s)	http://digitalcommons.fiu.edu/cgi/viewcontent.cgi?article=4387&context=etd
Alternate Webpage(s)	https://doi.org/10.25148/etd.FI15101238
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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