Experimental and theoretical analysis of water spreading on horizontal grooved surfaces

摘要

In this study, experiments were conducted to investigate the liquid drop spreading behavior on the grooved surface. The critical volume and the critical angle at which the water drop started to spread on the grooved surfaces were determined by the shadow method. It was found that the drop spreading on the grooved surface is a catastrophe process and the critical values vary with the groove structures. A thermodynamic method was proposed for predicting the critical drop volume spreading on the grooved surfaces with different structures. The consistency between the theoretical and experimental results is concluded to be satisfactory.

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