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Experimental Heat Transfer
A Journal of Thermal Energy Generation, Transport, Storage, and Conversion
Volume 24, 2011 - Issue 4
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Original Articles

Solidification of a Liquid Super-Eutectic Binary Alloy in an Enclosure with a Slanted Side Cooling Wall

Y.-C. Shih Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei, Taiwan, R.O.C.
,
Y.-Y. Shun Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei, Taiwan, R.O.C.
&
C.-C. Chiu Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei, Taiwan, R.O.C.
Pages 335-354 | Received 19 May 2010, Accepted 22 Dec 2010, Published online: 22 Sep 2011
 
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Abstract

This study considers the effect of a slanted side cooling wall that has varying inclination angles on the development of thermosolutal convection during the solidification of a super-eutectic aqueous ammonium chloride (NH4Cl-H2O) solution. The shadowgraph and particle image velocimetry techniques were employed to observe the flow development and measure the flow velocity during solidification. The transient temperature distribution within the test cell was also measured by type-T thermocouples. Experimental results reveal that a more slanted side cooling wall accelerated the “filling-box” process, thus it could cause more serious A-segregates and material defects in the solidified ingot.

ACKNOWLEDGMENT

The support of the National Science Council of Taiwan ROC (contract NSC-99-2221-E-027-033-MY3) is gratefully acknowledged.

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