Thermocapillary Migration of Liquid Droplets Induced by a Unidirectional Thermal Gradient

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• 作者：Qingwen Dai ; M. M. Khonsari ; Cong Shen ; Wei Huang ; Xiaolei Wang
• 刊名：Langmuir
• 出版年：2016
• 出版时间：August 2, 2016
• 年：2016
• 卷：32
• 期：30
• 页码：7485-7492
• 全文大小：475K
• 年卷期：0
• ISSN：1520-5827

文摘

A liquid droplet placed on a nonuniformly heated solid surface will migrate from a high-temperature region to a low-temperature region. This study reports the development of a theoretical model and experimental investigation on the migration behavior of paraffin oil droplets induced by the unidirectional thermal gradient. Thin-film lubrication theory is employed to determine the migration velocity of droplets, and temperature dependence of viscosity is taken into account. Comparisons between experimental and numerical results are presented. An effective approach for estimating the thermocapillary migration velocity of droplets on lubrication is proposed.