Please use this identifier to cite or link to this item:
Title: A model for vertical frazil distribution
Authors: University of Idaho. Dept. of Civil Engineering.
Liou, Chyr Pyng.
Ferrick, M. G.
Keywords: Frazil ice
Turbulent flow
Mathematical model
Vertical frazil distribution
River ice
Lake ice
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: CRREL report ; 92-4.
Description: CRREL Report
Abstract: A model is presented for the evolution of frazil over depth and with time in a turbulent flow. The net upward migration due to buoyancy of the frazil is opposed by intermittent mixing induced by large energy-containing eddies. A surface renewal model is used to describe the effects of large eddy mixing. Parameters that represent an entire water body are obtained by averaging those of discrete water columns using a probability density function. These parameters include the concentration profile, the surface age, and the surface layer thickness. A dimensionless surface renewal frequency characterizes the frazil distribution at equilibrium. The rate of heat loss from the water surface, the surface renewal frequency, and the critical surface layer thickness determine whether the frazil will evolve toward a well-mixed equilibrium state or a layered state. The model provides a physical basis for understanding the transition between these states, consistent with existing empirical criteria and field data.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:CRREL Report

Files in This Item:
File Description SizeFormat 
CRREL-92-4.pdf595.1 kBAdobe PDFThumbnail