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相关概念视频

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Transmission-based precautions are for patients infected or suspected to be infected (or colonized) with organisms posing a significant risk to others. The transmission precautions include airborne and protective environment precautions.
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High Speed Droplet-based Delivery System for Passive Pumping in Microfluidic Devices
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按需滴滴使用正压脉冲.

Mathieu Oléron1,2, Grégoire Clement1,2, Samuel Hidalgo-Caballero1,2

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概括

这项研究引入了使用压力脉冲在微流体中按需滴滴生成. 这种方法可以控制滴水量和生产速度,甚至可以创建延长的插头,而这在稳定的流量下是不可能的.

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科学领域:

  • 微流体学 微流体学
  • 双相系统 双相系统
  • 流体动力学 流体动力学

背景情况:

  • 微流体学中的稳定状态滴滴生成受压力范围的限制.
  • 高压可以导致稳定的液体喷气形成,而不是水滴.
  • 压力条件决定了稳定流量的滴滴体积和生成速度.

研究的目的:

  • 开发一种使用正压脉冲的按需滴滴生产方法.
  • 为了使滴滴产生在稳定状态压力极限内和超出.
  • 在微流体系统中,将滴滴量与生产率脱.

主要方法:

  • 使用一个流量聚焦的微流体几何.
  • 将正压脉冲应用于分散相输入口.
  • 开发一个简单的模型,考虑液压电阻来捕捉滴滴的行为.

主要成果:

  • 实现了按需滴滴生成和控制.
  • 启用了超出典型稳定状态压力范围的滴滴产量.
  • 证明了在脉冲压的峰值时形成长长的插头.
  • 经过验证的滴滴体积和生成发作与液压阻力模型.

结论:

  • 按需通过压力脉冲生成滴滴,可以对双相系统进行增强的控制.
  • 这一策略将滴水量与生产率脱,扩大了微流体能力.
  • 开发的模型提供了设计规则,用于创建单个滴水或延长的插头.