Boundary layer correlation for dendrite tip growth with fluid flow

被引：55

作者：

Gandin, CA ^{[1
]}

Guillemot, G ^{[1
]}

Appolaire, B ^{[1
]}

Niane, NT ^{[1
]}

机构：

[1] Ecole Mines, Lab Sci & Genie Mat & Met, UMR CNRS INPL UHP 7584, F-54042 Nancy, France

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2003年 / 342卷 / 1-2期

关键词：

dendrite growth kinetics; solidification; fluid flow; boundary layer correlation; Al-Si;

D O I：

10.1016/S0921-5093(02)00261-7

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A correlation is presented for the calculation of the size of a stagnant film located in the liquid ahead of a paraboloidal dendrite, which grows steadily into an undercooled melt in the presence of fluid flow. The coefficients of the correlation are deduced from a fitting exercise of the supersaturation versus dimensionless numbers to the analytical solution developed for the Stokes flow approximation. It is shown that the correlation presented in this contribution offers several advantages compared with the Wang and Beckermann correlation previously published in the literature (Metall. Mater. Trans. 27A (1996) 2754). Not only the fit is improved, but it can also be extended to account for the angle between the dendrite growth direction and the fluid flow direction. Applications are given for an Al-7 wt.% Si alloy. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：44 / 50

页数：7

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