蒸发液滴内部的相分离迸发和对称性破坏;形成花朵状图案

Vahid Nasirimarekani
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引用次数: 0

摘要

液相内部的图案形成是一种涉及地球上许多不同生活方面的现象。液体蒸发后形成的液滴可以显示出取决于液滴化学性质和相关物理参数的图案。我们观察到,在含有盐和非离子聚合物的液滴蒸发过程中,微米大小的颗粒呈花朵状沉积。我们的实验表明,由于盐析效应,聚合物的相分离会导致强烈的熵流,表现为涡流。这种流动被称为 "相分离爆发流",它导致轴向对称性被打破,并形成径向排列的花朵状图案。我们预计,理解所观察到的流动可以深入了解相分离的流体物理学方面,并可能对技术应用产生影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Phase separation bursting and symmetry breaking inside an evaporating droplet; formation of a flower-like pattern
Pattern formation inside a liquid phase is a phenomenon involved in many different aspects of life on our planet. The droplet form of a liquid that evaporates can reveal patterns that depend on the chemistry of the droplet and the physical parameters involved. We observed a flower-like deposition pattern of micrometer-sized particles as a result of the evaporation of a droplet containing salt and a non-ionic polymer. We show experimentally that the phase separation of the polymer due to the salting-out effect causes a strong entropic flow, which manifests as vortices. The flow is called phase separation bursting flow, which leads to the axial symmetry breaking and the formation of a radially aligned flower-like pattern. We foresee that understanding the observed flow can provide insights into the fluid physics aspects of phase separation and may have implications for technical applications.
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