Condensation and jumping relay of droplets on lotus leaf release_2y7gho5jybednhv5bz3zr2fjcu

by Cunjing Lv, Pengfei Hao, Zhaohui Yao, Yu Song, Xiwen Zhang, Feng He

Released as a article .

2013  

Abstract

Dynamic behavior of micro water droplet condensed on a lotus leaf with two-tier roughness is studied. Under laboratory environment, the contact angle of the micro droplet on single micro papilla increases smoothly from 80 deg to 160 deg during the growth of condensed water. The best-known "self-clean" phenomenon, will be lost. A striking observation is the out-of-plane jumping relay of condensed droplets triggered by falling droplets, as well as its sustained speed obtained in continuous jumping relays, enhance the automatic removal of dropwise condensation without the help from any external force. The surface tension energy dissipation is the main reason controlling the critical size of jumping droplet and its onset velocity of rebounding.
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Date   2013-05-09
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arXiv  1305.2032v1
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