It is found that Marangoni number have a significant influence on drop migration velocity. Reynolds numbers have only slight impact on the migration velocity but can affect the accelerating process obviously. The ratio of drop viscosity to mother liquid has the most important effect on migration velocity,and the enlargement of the drop speed caused by bigger viscosity ratio is higher than linear growth. The viscosity force of the background liquid can be viewed as the driving force and the resistance of the drop migration simultaneously.
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