论文标题
液体涂层纤维的蒸发
Evaporation of liquid coating a fiber
论文作者
论文摘要
我们从理论和数字上研究了沉积在纤维上的液体的扩散限制蒸发，分为两种构型：套筒和轴对称桶形液滴。对于袖子，局部通量取决于纵横比和问题的最小长度。通过使用分析计算和3D有限元模拟，我们预测这种通量的差异随着纵横比的增加而进一步定位在边缘。用数值模拟研究了纤维上轴对称滴的蒸发。对于足够大的体积，我们证明蒸发速率几乎与液体的润湿特性无关，即使对于小接触角，并且液滴作为相同体积的球体蒸发。
We investigate theoretically and numerically the diffusion-limited evaporation of a liquid deposited on a fiber in two configurations: a sleeve and a axisymmetric barrel-shaped droplet. For a sleeve, the local flux depends on both the aspect ratio and the smallest length of the problem. By using analytical calculations and 3D finite elements simulations, we predict a divergence of this flux further localized at the edge as the aspect ratio increases. The evaporation of axisymmetric drops on a fiber is studied with numerical simulations. For sufficiently large volumes, we evidence that the evaporation rate is almost independent of the wetting properties of the liquid, even for small contact angles, and that the droplets evaporate as spheres of the same volume.
