由固化诱导的溶性马兰戈尼流驱动的自升滴
Feng Wang1, Li Chen1, Yuqi Li1
1Department of Aeronautics and Astronautics, Fudan University, Shanghai 200433, China.
Physical review letters
|January 19, 2024
概括
研究人员观察到冷的二进制液滴由于内部溶性马兰戈尼流动而自我提升,抵御重力. 这种由固化前线附近溶液度驱动的现象,为多元组分滴滴动力学提供了洞察力.
科学领域:
- 物理 物理学 物理
- 流体动力学 流体动力学
- 材料科学 材料科学 材料科学
背景情况:
- 多元组件液滴对于3D打印,电子和医学诊断等应用至关重要.
- 滴滴变化和形态通常是由蒸发引起的流量和相位过渡驱动的.
研究的目的:
- 为了研究冷的二进制滴的自我提升行为.
- 要了解底层的物理化学水力动力学驱动这种反直觉的现象.
主要方法:
- 实验观察滴滴自升的情况.
- 理论分析包括固化前部传播.
- 量化阐明物理参数对自升机的影响.
主要成果:
- 冰的二进制滴体的自我提升被证明,几乎使它们的高度在抗重力的情况下翻了一番.
- 确定了作为驱动机制的内部溶液马兰戈尼流,达到高达1毫米/秒的速度.
- 在理论预测和实验结果之间取得了很好的一致性,用于滴水形状演变.
结论:
- 该研究将滴滴自升归因于溶解物马兰戈尼流,由固化前线的溶解物度梯度驱动.
- 为控制自我提升行为提供了定量理解和指导.
- 提升了用于技术应用的相变多元件液体系统中的水力动力学知识.
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