Open AccessEffect of far field flow on the stability of thespherical crystal in undercooled melt
Author(s) -
Bin Cao,
Lin Xin,
Weidong Huang
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.066403
Subject(s) - materials science , perturbation (astronomy) , radius , mechanics , growth rate , melt flow index , crystal (programming language) , flow (mathematics) , crystal growth , thermal , spherical model , condensed matter physics , thermodynamics , physics , composite material , geometry , mathematics , computer science , programming language , computer security , quantum mechanics , copolymer , polymer
A model is developed to investigate the effects of far field flow on the solidification of a spherical particle from the melt, under the influence of thermal and solute flow. The stability of the spherical interface is studied and the growth rate of the interface perturbation is calculated. The perturbation to the maximum growth rate becomes larger when the spherical radius increases. The downwind side of the interface is more unstable than the upwind side. The effect of far field flow reduces the critical radius of the spherical crystal.