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Titolo:
Nonlinear instability and dynamic bifurcation of a plane interface during solidification
Autore:
Wu, JP; Hou, AX; Huang, DH; Bao, ZY; Gao, ZO; Qu, SS;
Indirizzi:
Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China Wuhan UnivWuhan Peoples R China 430072 i, Wuhan 430072, Peoples R China Northwestern Polytech Univ, State Key Lab Solidificat Technol, Xian 710072, Peoples R China Northwestern Polytech Univ Xian Peoples R China 710072 , Peoples R China China Univ Geosci, Fac Mat Sci & Chem Engn, Wuhan 430074, Peoples R China China Univ Geosci Wuhan Peoples R China 430074 n 430074, Peoples R China China Univ Geosci, Fac Earth Sci, Wuhan 430074, Peoples R China China UnivGeosci Wuhan Peoples R China 430074 n 430074, Peoples R China
Titolo Testata:
SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES
fascicolo: 5, volume: 44, anno: 2001,
pagine: 507 - 521
SICI:
2095-0624(200110)44:5<507:NIADBO>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
DIRECTIONAL SOLIDIFICATION; STABILITY; MODEL;
Keywords:
solidification; non-equilibrium and nonlinear; interface instability; bifurcation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Wu, JP Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China Wuhan Univ Wuhan Peoples R China 430072 n 430072, Peoples R China
Citazione:
J.P. Wu et al., "Nonlinear instability and dynamic bifurcation of a plane interface during solidification", SCI CHINA E, 44(5), 2001, pp. 507-521

Abstract

By taking average over the curvature, the temperature and its gradient, the solute concentration and its gradient at the flange of planar interface perturbed by sinusoidal ripple during solidification, the nonlinear dynamic equations of the sinusoidal perturbation wave have been set up. Analysis ofthe nonlinear instability and the behaviors of dynamic bifurcation of the solutions of these equations shows that (i) the way of dynamic bifurcation of the flat-to-cellular interface transition varies with different thermal gradients. The quasi-subcritical-lag bifurcation occurs in the small interface thermal gradient scope, the supercritical-lag bifurcation in the mediumthermal gradient scope and the supercritical bifurcation in the large thermal gradient scope. ( ii) The transition of cellular-to-flat interface is realized through supercritical inverse bifurcation in the rapid solidification area.

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Documento generato il 29/03/20 alle ore 01:45:54