• 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 >Evaporation of an isolated liquid plug moving inside a capillary tube
【24h】

Evaporation of an isolated liquid plug moving inside a capillary tube

机译：在毛细管内移动的隔离液塞的蒸发

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 paper reports an experimental study to understand the evaporation mechanism of a partially wetting isolated liquid plug (methanol) of length i moving inside a long, dry, horizontal circular glass capillary tube (ID = 1.5 mm). The plug (with specified range of non-dimensional L/D ratios) is pushed from rest by controlled injection of air from one side, till a quasi-steady terminal plug velocity is achieved in the adiabatic section (non-heated length) of the capillary tube. Under such conditions, the drainage of thin-film occurring at the receding interface and its subsequent dewetting is well predicted by existing literature. The plug is then allowed to move through the heated section maintained at constant wall temperature (lesser than the saturation temperature of methanol). The drained film now starts evaporating rapidly, drastically affecting the bulk transport behavior. High resolution videography, coupled with laser confocal microscopy provides vital bulk as well as local information, including time-varying plug length, film thickness and local dewetting behavior near the contact line. Experimental results obtained for different wall temperatures and different initial L/D ratios of liquid plug suggests that the Taylor's law for predicting drainage characteristics under adiabatic flow conditions is valid, even for cases where there is a continuous evaporation of thin-film. The study thus provides a framework for modeling evaporative flux based on simple hydrodynamic theory of film drainage.
机译：该论文报告了一项实验研究，以了解长度为i的部分润湿的隔离液体塞（甲醇）在长而干燥的水平圆形玻璃毛细管（ID = 1.5 mm）内移动的蒸发机理。通过从一侧有控制地注入空气，将塞子（具有特定尺寸的无量纲L / D比率）从静止状态推开，直到在绝热段的绝热部分（非加热长度）达到准稳定的终端塞子速度。毛细管。在这样的条件下，现有文献很好地预测了在后退界面处发生的薄膜排水和随后的去湿。然后允许塞子通过加热部分，并保持恒定的壁温（低于甲醇的饱和温度）。现在，排出的薄膜开始迅速蒸发，从而严重影响了整体运输行为。高分辨率摄像技术与激光共聚焦显微镜相结合，可提供重要的体积以及局部信息，包括随时间变化的插头长度，薄膜厚度和接触线附近的局部脱湿行为。在不同的壁温和不同的液塞初始L / D比下获得的实验结果表明，即使在连续蒸发薄膜的情况下，用于绝热流动条件下的排水特性预测的泰勒定律也是有效的。因此，该研究为基于膜排水的简单流体力学理论的蒸发通量建模提供了框架。

著录项

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