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Flow-induced morphological instability of a mushy layer

FELTHAM, D. L. and GRAE WORSTER, M. (1999) Flow-induced morphological instability of a mushy layer. Journal Of Fluid Mechanics, 391. pp. 337-357. ISSN 0022-1120

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To link to this article DOI: 10.1017/S002211209900539X

Abstract/Summary

A morphological instability of a mushy layer due to a forced flow in the melt is analysed. The instability is caused by flow induced in the mushy layer by Bernoulli suction at the crests of a sinusoidally perturbed mush–melt interface. The flow in the mushy layer advects heat away from crests which promotes solidification. Two linear stability analyses are presented: the fundamental mechanism for instability is elucidated by considering the case of uniform flow of an inviscid melt; a more complete analysis is then presented for the case of a parallel shear flow of a viscous melt. The novel instability mechanism we analyse here is contrasted with that investigated by Gilpin et al. (1980) and is found to be more potent for the case of newly forming sea ice.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:35054
Publisher:Cambridge University Press

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