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同向流动微气泡产生与分裂的实验研究
  • 期刊名称：工程热物理学报30(2009)：1197-1200
  • 时间：0
  • 分类：V235[航空宇航科学与技术—航空宇航推进理论与工程;航空宇航科学技术]
  • 作者机构：[1]动力机械与工程教育部重点实验室,上海交通大学机械与动力工程学院,上海200240
  • 相关基金：国家自然科学基金（No.50536010）;上海市科技委员会资助项目（No.08JC1411100）
  • 相关项目：微/纳尺度条件下的流体流动与传热传质研究
关键词： 硅微通道, 同向流动, 频率, 气泡分裂, microchannels, co-flowing, frequency, bubble breakup
中文摘要：

本文使用高速CCD可视化技术研究硅微通道内气液等温同向流动微气泡形成过程。作为离散相的空气和连续相的水,流经各自通道后汇聚在主通道前段;在一定的流量比值范围内,连续产生大小均匀的微气泡;发现存在bubbling和jetting两种微气泡形成模式。气泡产生频率随空气和水的流速增大而增加。最后研究了气泡在T型微通道出口处的行为,观察到分裂和不分裂两种形式并进行了分析。

英文摘要：

Abstract The generation of micro air bubbles in co-flowing of water in silicon microchannels is investigated with the aid of high-speed CCD. Air and water, used as discontinuous and carrier fluid, are first co-flowing in the air and liquid microchannels separately, and then converge in the main microchannel downstream. Monodisperse micro air bubbles are generated periodically under identified mass flux ratio. Two modes of bubble formation, bubbling and jetting, are observed. It is found bubble formation frequency increases with increasing air or water flow rates. Finally, bubble behavior at a T junction is investigated, and breaking and non-breaking bubble behaviors are observed and analyzed.

同期刊论文项目
微/纳尺度条件下的流体流动与传热传质研究
期刊论文 46 会议论文 19
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