Effect of Suspended Particles on the Drying Process of a Carrier‐Fluid Droplet Sitting on a Solid Surface
Effect of Suspended Particles on the Drying Process of a Carrier‐Fluid Droplet Sitting on a Solid Surface
复制标题
悬浮颗粒对固体表面上载体液滴干燥过程的影响
DOI：
10.1111/j.1749-6632.2009.04094.x
复制
发表时间：
2009
影响因子：
5.2
通讯作者：
I. Ueno
中科院分区：
文献类型：
--
作者：
Kazunori Kochiya;I. Ueno
我们重点研究挥发性液滴在温控固体基质上的蒸发过程。该过程受到液滴内悬浮微小颗粒的强烈影响，导致一种众所周知的现象，称为“咖啡渍问题”。本研究的目标系统是（1）水-亲水颗粒和（2）水-乙醇混合物-亲水颗粒。通过应用三维粒子跟踪测速技术，可以将蒸发过程中诱导流中的时空粒子运动可视化。还讨论了蒸发过程中的颗粒行为与干燥后液滴形态模式之间的相关性。
We focus on an evaporation process of a volatile droplet on a temperature‐controlled solid substrate. The process is strongly affected by suspending tiny particles inside the droplet, resulting in a well‐known phenomenon called the “coffee stain problem.” The target systems in this study are (1) the water‐hydrophilic particle and (2) the water‐ethanol mixture–hydrophilic particle. Spatio‐temporal particle motion in the induced flow in the evaporation process is visualized by applying three‐dimensional particle tracking velocimetry. The correlation between the particle behavior in the evaporation process and the morphological pattern of the droplet after dryout is also discussed.