Interaction of interface and rigid particle during unidirectional freezing process - I. Phenomena description
Journal
Yingyong Jichu yu Gongcheng Kexue Xuebao/Journal of Basic Science and Engineering
Journal Volume
12
Journal Issue
2
Pages
187-196
Date Issued
2004
Author(s)
Abstract
A Bridgman unidirectional freezing method is employed to observe the interaction of interface and rigid particles having diameter of millimeter order. Three different phenomena according to the freezing rate are experimentally classified. The classical lubricating theory points out that there always exist small gaps between particles and interface. Fluid will flow into the gaps to replenish the growth of ice crystal. At low freezing rate, the interface should conquer the friction to move the particles away. At mediate freezing rate, the ice front is smooth. Liquid around the particle has enough time to flow into the gaps between the particle and the interface. At high freezing rate, the interface is easily to be dendrite like and engulf the particle. The interface inclined to show two edges at the top and bottom of liquid layer. The width of two edges decreases with the freezing rate.
Subjects
Interaction
Interface
Rigid particle
Unidirectional freezing
Type
journal article