Localized microstructures induced by fluid flow in directional solidification -: art. no. 166105

被引：53

作者：

Jamgotchian, H ^{[1
]}

Bergeon, N ^{[1
]}

Benielli, D ^{[1
]}

Voge, P ^{[1
]}

Billia, B ^{[1
]}

Guérin, R ^{[1
]}

机构：

[1] Univ Aix Marseille 3, Fac Sci & Tech St Jerome, CNRS, UMR 6137,Lab Mat & Microelect Provence, F-13397 Marseille 20, France

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.87.166105

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The dynamical process of microstructure localization by multiscale interaction between instabilities is uncovered in directional solidification of transparent alloy. As predicted by Chen and Davis, morphological instability of the interface is observed at inward flow-stagnation regions of the cellular convective field. Depending on the driving force of fluid flow, focus-type and honeycomb-type localized patterns form in the initial transient of solidification, that then evolves with time. In the case of solute-driven flow, the analysis of the onset of thermosolutal convection in initial transient of solidification enables a complete understanding of the dynamics and of the localization of morphological instability.

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页码：1 / 166105

页数：4

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