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The effect of the shear flow on particle growth in the undercooled melt

机译:剪切流对过冷熔体中颗粒生长的影响

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摘要

We study the effect of the linear shear flow on particle growth in the undercooled melt by using the method of matched asymptotic expansion. The analytical result shows that the shear effect of flow results in the significant distorted deformation of the interface. Under the combined action of both shear flow and anisotropic surface tension, the lateral interface of the particle is further compressed but the upper interface and lower interface further grow during the early stage after nucleation to form the distorted ear-like shape formation. As a result, the minimum inner diameter decreases to less than two times the critical radius for nucleation and the strength of the particle becomes weaker, and then the particle will split or be broken into several more fine particles. The analytical result provides the prediction of the interface evolution of the particle under the influence of the linear shear flow.
机译:我们使用匹配渐近膨胀法研究了线性剪切流对过冷熔体中颗粒生长的影响。分析结果表明,流动的剪切效应导致界面的明显变形。在剪切流和各向异性表面张力的共同作用下,成核后的早期,颗粒的侧向界面被进一步压缩,而上部和下部界面进一步生长,形成扭曲的耳状形状。结果,最小内径减小到小于成核临界半径的两倍,并且颗粒的强度变弱,然后颗粒将分裂或破碎为更多的细颗粒。分析结果提供了在线性剪切流影响下颗粒界面演变的预测。

著录项

  • 来源
    《Journal of Crystal Growth》 |2014年第1期|116-119|共4页
  • 作者单位

    School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China;

    School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China;

    School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China;

    School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China,Wuxi Radio and Television University, Jiangsu, Wuxi 214011, China;

    School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China;

    School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    A1. Solidification; A1. Interfaces; A1. Convection; A1. Fluid flows; A1. Nucleation; A1. Stirring;

    机译:A1。凝固;A1。接口;A1。对流;A1。流体流动;A1。成核;A1。搅拌;

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