• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Numerical and experimental investigation of mixing characteristics in the constructal tree-shaped microchannel
【24h】

Numerical and experimental investigation of mixing characteristics in the constructal tree-shaped microchannel

机译：构造树状微通道混合特性的数值和实验研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The constructal tree-shaped configuration was presented for the application of rapid mixing of fluids in the microchannel, inspired by the geometry of biological tissues. Mixing characteristics of such configuration was investigated by computer simulation and was then supported experimentally. The Navier-Stokes equations were solved for the elementary T-junction structure, and three flow regimes were distinguished with the increase of Reynolds numbers, namely stratified, vortex and engulfment regimes. Due to the presence of secondary flow, the intertwinement of streamlines induced by the vortex flow causes decrease of the scale of segregation and the reduction of the diffusive distance in the mixing process. Variations of concentration distributions and mixing efficiencies along the mixing channel and with Reynolds number were analyzed and compared for the single, double, and triple T-shaped microchannels. The results showed that high mixing performance could be achieved even at relatively low Reynolds number by using the constructal tree-shaped structure. Furthermore, several tree-shaped microstruc-tures were fabricated to conduct the verification experiments for numerical simulations. Numerical and experimental investigations indicated that the constructal tree-shaped structure, which consists of a large number of multi-T channels, is an excellent configuration for the micromixing.
机译：提出了结构树形配置，以在生物组织的几何形状的启发下在微通道中快速混合流体。通过计算机仿真研究了这种配置的混合特性，然后通过实验对其进行了支持。求解了基本的T型结结构的Navier-Stokes方程，并随着雷诺数的增加区分了三种流动状态，即分层，涡旋和吞噬状态。由于二次流的存在，由涡流引起的流线的缠绕导致混合过程中偏析程度的减小和扩散距离的减小。分析并比较了单个，双重和三重T形微通道沿混合通道的浓度分布和混合效率的变化以及雷诺数的变化。结果表明，通过使用结构树形结构，即使在相对较低的雷诺数下也可以实现高混合性能。此外，制造了几种树形微结构以进行数值模拟的验证实验。数值和实验研究表明，由大量的多T通道组成的结构树形结构是微混合的绝佳配置。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2013年第12期|1014-1023|共10页
  • 作者

    Lijun Wang; Wei Wu; Xi Li;

  • 作者单位

    Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China;

    Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China;

    Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China;

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

    Constructal; Mixing; Nature-Inspired Way; Microfluidics; Hydrodynamics;

    机译：结构性混合;自然启发的方式;微流体;流体力学;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号