The friction opposing drops moving on liquid-infused surfaces is experimentally characterized in various configurations (drops sliding down an incline, drops confined in Hele-Shaw cells, bubbles rising on immersed materials). It is found that viscous resistance mainly takes place in the oil meniscus surrounding the drop, which leads to a universal scaling law for the friction, in agreement with the observations.
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Keiser et al. (2020) studied this question.
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