On the role of convection in free dendritic growth: Experimental measurement of the concentration field

被引：9

作者：

Emsellem, V ^{[1
]}

Tabeling, P ^{[1
]}

机构：

[1] UNIV PARIS 07,PHYS STAT LAB,ECOLE NORMALE SUPER,LAB CNRS,ENS,F-75231 PARIS 05,FRANCE

来源：

JOURNAL OF CRYSTAL GROWTH | 1996年 / 166卷 / 1-4期

关键词：

D O I：

10.1016/0022-0248(96)00070-X

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

We present an experiment designed to visualise the concentration field during the growth of dendrites. It is used to assess the role of convection by exploring three situations: growth in a gel, growth in a solution and forced imposed external flow. The observations bear on the qualitative concentration field and the quantitative measurement of the supersaturation. We show that the observations in the three cases can be correctly explained by, respectively, diffusion alone (Ivantsov theory), destabilisation of the Liquid by natural convection and a uniform flow at the scale of the dendrite.

引用

页码：251 / 255

页数：5

共 9 条

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