在剪切加厚非布罗恩合液滴中,亚纽顿凝聚力学
M V R Sudheer1, Sarath Chandra Varma2, Aloke Kumar2
1Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi 221005, India. udita.che@iitbhu.ac.in.
Soft matter
|March 27, 2025
概括
这项研究表明,剪切加厚液体,如玉米粉悬浮液,表现出延迟的滴滴凝聚,类似于聚合物液体. 这种子牛顿式的行为与粒子度和粘弹性效应有关.
科学领域:
- 流体动力学 流体动力学
- 复杂的流体 复杂的流体
- 类风病学 类风病学 类风病学
背景情况:
- 聚合物流体表现出亚纽顿凝聚力学.
- 剪切加厚液体被假设显示类似的延迟凝聚.
研究的目的:
- 为了研究剪切加厚液体中的子牛顿凝聚力学.
- 量化颗粒度对滴滴凝聚的作用.
主要方法:
- 使用了水性玉米粉悬浮液的水滴.
- 使用实时高速成像研究了凝聚力学动态.
- 在凝聚过程中量化了部的时间演变.
主要成果:
- 凝聚性接遵循一个强度定律R = at^b,b ≤0.5,表明子牛顿行为.
- 确定了两个不同的凝聚模式 (b ≈ 0.5 和 b < 0.5).
- 在较高的粒子分数 (φw > 0.35) 中观察到粘弹性挤压反应和阻塞/流动区域.
结论:
- 剪切加厚液体表现出亚牛顿凝聚.
- 凝结动力学取决于粒子度,可以表现出粘弹性效应.
- 提出了一个理论模型来解释延迟的凝聚.
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