...
  • 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 >Second moment closure modelling of flow, turbulence and heat transfer in droplet-laden mist flow in a vertical pipe with sudden expansion
【24h】

Second moment closure modelling of flow, turbulence and heat transfer in droplet-laden mist flow in a vertical pipe with sudden expansion

机译：突然膨胀的垂直管道中含液滴的雾流的流动，湍流和热传递的二阶矩闭合模型

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 gas and droplet mean velocities, gas turbulence modulation, droplet dispersion and heat transfer of a dilute gas-droplet two-phase flow in a vertical pipe with sudden expansion are predicted using a two-fluid Eulerian model. The effect of various particle mass loadings, inlet Reynolds numbers and particle diameters on these characteristics is investigated. The turbulence of the carrier phase is modelled using second-moment closure (SMC). The results obtained using SMC are compared with those derived with the k - ε model. The presence of finely dispersed droplets in the flow attenuates gas-phase turbulence by up to 25% in the axis zone. In the wall area, the mass fraction of droplets is much lower than that in the axial region of the pipe due to droplet evaporation. Heat transfer in the gas-droplet separated flow increases (by more than twice that in single-phase air flow). Intensification of heat transfer is observed both in the recirculation zone and flow development region in the case of fine particles.
机译：使用双流体欧拉模型预测了垂直管道中具有突然膨胀的稀薄液滴两相流中的气体和液滴平均速度，气体湍流调制，液滴扩散和传热。研究了各种颗粒质量负载，入口雷诺数和颗粒直径对这些特性的影响。使用第二矩闭合（SMC）对载体相的湍流进行建模。将使用SMC获得的结果与通过k-ε模型得出的结果进行比较。气流中细微分散的液滴的存在会在轴心区域将气相湍流衰减多达25％。在壁区域中，由于液滴蒸发，液滴的质量分数远低于管道轴向区域的质量分数。液滴分离流中的热传递增加（是单相空气流中的热传递的两倍以上）。对于细颗粒，在再循环区和流动发展区都观察到热传递增强。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2013年第11期|210-222|共13页
  • 作者

    M.A. Pakhomov; V.I. Terekhov;

  • 作者单位

    Laboratory of Thermal and Gas Dynamics, Kutateladze Institute of Thermophysics, Siberian Branch of Russian Academy of Sciences, Acad. Lavrent'ev Avenue 1, 630090 Novosibirsk, Russia;

    Laboratory of Thermal and Gas Dynamics, Kutateladze Institute of Thermophysics, Siberian Branch of Russian Academy of Sciences, Acad. Lavrent'ev Avenue 1, 630090 Novosibirsk, Russia;

  • 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

    Gas-droplet turbulent separated flow; Evaporation; Eulerian/Eulerian two-fluid model;

    机译：液滴湍流分离流;蒸发;欧拉/欧拉二流体模型;

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