Zaitsev Dmitry V, Kirichenko Dmitry P, Kabov Oleg A, Ajaev Vladimir S
Institute of Thermophysics, SB RAS, Novosibirsk 630090, Russia.
Institute of Thermophysics, SB RAS, Novosibirsk 630090, Russia and Novosibirsk State Technical University, Novosibirsk 630073, Russia.
Soft Matter. 2021 May 5;17(17):4623-4631. doi: 10.1039/d0sm02185g.
We report experimental studies and develop mathematical models of levitation of microscale droplets over an evaporating liquid layer. The maximum size of droplets is estimated from the balance between gravity and Stokes force due to the action of upward Stefan flow generated by evaporation. Mathematical models of diffusion around levitating droplets allow us to determine Stefan flow velocity at the liquid layer surface. These results are then used to determine the dependence of levitation height on droplet size. Experimental data for a range of conditions are shown to collapse onto a single curve predicted from the model.
我们报告了关于微尺度液滴在蒸发液体层上悬浮的实验研究，并建立了相关数学模型。液滴的最大尺寸是根据重力与因蒸发产生的向上斯蒂芬流作用下的斯托克斯力之间的平衡来估算的。围绕悬浮液滴的扩散数学模型使我们能够确定液体层表面的斯蒂芬流速度。然后利用这些结果来确定悬浮高度与液滴尺寸之间的关系。一系列条件下的实验数据显示符合该模型预测的单一曲线。
