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RESEARCH PAPERS

Microscopic Pattern of Ice Crystal Growth in the Presence of Thermal Hysteresis Proteins

[+] Author and Article Information
R. Coger, B. Rubinsky

Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720

G. Fletcher

Marine Sciences Research Laboratory, Memorial University of Newfoundland, St. John’s, Newfoundland A1CS7, Canada

J. Offshore Mech. Arct. Eng 116(3), 173-179 (Aug 01, 1994) (7 pages) doi:10.1115/1.2920147 History: Received January 04, 1994; Online June 12, 2008

Abstract

This study examines the effect of thermal hysteresis proteins (THPs) from the winter flounder (Psuedopleuronectes americanus ) on the ice-water interface morphology during freezing of aqueous solutions. Experiments were performed using a directional solidification stage, and the development of the two-phase interface was observed through a microscope and recorded by a video system. Unusual ice crystal morphologies were observed, including faceted ice crystal growth along the [1100] crystal plane; spicular or needlelike growth in the [1010] direction; and growth parallel to the c -axis, [0001], consisting of incorporated liquid inclusions bounded by hexagonal prism faces. The observed crystallographic structures can be explained as an effect of the interaction between the THPs and the primary prism faces of ice crystals. This results in an increase in the Gibbs free energy of these planes, followed by ice growth into the supercooled liquid adjacent to these faces.

Copyright © 1994 by The American Society of Mechanical Engineers
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