剪切稀释的整形学和几何不对称性控制了分支微通道中的滴滴动态
Rakesh Kumar1,2, Rajaram Lakkaraju3, Arnab Atta1,2
1Advanced Technology Development Centre, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India. yashram1993@gmail.com.
Soft matter
|February 10, 2026
概括
剪切稀释液体的风湿学显著影响微流体器件中的滴滴形成和分解. 这项研究揭示了流体特性和通道几何学如何控制滴滴大小和频率,以获得更好的微流体设计.
科学领域:
- 多相流动动力学 多相流动力学
- 微流体工程 微流体工程
- 复杂液体的风病学 复杂液体的风病学
背景情况:
- 滴滴的形成和分解在微流体应用中至关重要.
- 了解流体体质学和通道几何学的影响对于控制这些过程至关重要.
- 剪切稀释液,就像桑坦溶液一样,表现出复杂的流动行为.
研究的目的:
- 研究带有不对称收缩的分支微通道中的滴滴形成和断裂.
- 为了确定剪切稀释力学,特别是功率定律指数 (n) 对滴滴动态的影响.
- 在多相微流体学中建立用于预测扩展的设计原则.
主要方法:
- 实验调查使用香甘溶液 (连续阶段) 和大豆油 (分散阶段).
- 度在400-1500 ppm之间.
- 经过验证的三维模拟补充了实验数据.
- 进行了时间解析的压力和速度场分析.
主要成果:
- 观察到上游压力振荡,随着功率定律指数 (n) 的下降,振幅增加.
- 当通过有效毛细管数重新缩放时,规范化的滴长数据倒塌到一个通用功率定律曲线上.
- 增加n导致滴滴体积增加,前端速度降低.
- 与牛顿流体相比,剪切稀释系统显示了更平的核心速度配置文件.
结论:
- 剪切稀释类风湿学和通道不对称性协同控制滴滴的断裂和分离.
- 电力定律指数 (n) 是一个关键参数,将风病与滴滴大小和形成频率联系起来.
- 结果为设计和扩展多相微流体系统提供了基本原则.
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