Solute Deposit during Evaporation of a Sessile Binary Liquid Micro-Droplet on a Substrate
Solute Deposit during Evaporation of a Sessile Binary Liquid Micro-Droplet on a Substrate
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DOI：
10.1252/jcej.37.778
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发表时间：
2004-06
影响因子：
0.8
通讯作者：
Yoshio Morozumi;H. Ishizuka;J. Fukai
中科院分区：
文献类型：
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作者：
Yoshio Morozumi;H. Ishizuka;J. Fukai
通过实验和数值研究了二元液体固着液滴蒸发期间溶质环状沉积物的形成。研究了液滴扩散半径和基底表面温度对溶质环状沉积的影响。环宽度随着扩展半径和基底温度的降低而增加。使用固着液滴中溶质转移的理论模型，以数值方式获得液滴表面的蒸发速率分布，以预测蒸发后溶质薄膜的形状。当衬底温度较低时，接触线附近蒸发速率的增加受到抑制。结果，导致溶质转移的液滴朝向接触线的速度很小，然后环宽度增加。
Formation of a ring-like deposit of solute during the evaporation of a binary liquid sessile droplet on a substrate was studied both experimentally and numerically. The effects of the droplet spread radius and substrate surface temperature on ring-like deposit of solute were investigated. The ring width increased with a decrease in the spread radius and the substrate temperature. The evaporation rate distributions on the droplet surface were numerically obtained to predict the shape of the thin film of solute after the evaporation using a theoretical model for solute transfer in a sessile droplet. When the substrate temperature was low, the increase in the evaporation rate near the contact line was inhibited. As a result, the velocity in the droplet toward the contact line, which caused the solute transfer, was small and then the ring width increases.