Extraordinarily Rapid Rise of Tiny Bubbles Sliding beneath Superhydrophobic Surfaces

Cyuan Jhang Wu, Cheng Chung Chang, Yu Jane Sheng, Heng Kwong Tsao

研究成果: 雜誌貢獻期刊論文同行評審

10 引文 斯高帕斯(Scopus)

摘要

Tiny bubbles readily stick onto substrates owing to contact angle hysteresis (CAH). Nevertheless, they can slide slowly on a tilted surface with ultralow CAH because capillarity is overcome by buoyancy. It is surprising to observe experimentally that bubbles of 3-15 µL (diameter 1.79-3.06 mm) slide beneath a tilted superhydrophobic surface at a vertical ascent rate faster than that of freely rising ones of high Reynold numbers ˜O(102). As the tilting angle increases, the drag coefficient remains essentially the same as that of a freely rising bubble, but the frontal area of the flat bubble rises monotonically. Nonetheless, the frontal area of the sliding bubble always stays much smaller than that of a freely rising bubble. Consequently, the small drag force associated with the sliding bubbles is attributed to their substantially small frontal areas on superhydrophobic surfaces.

原文???core.languages.en_GB???
頁(從 - 到)1326-1331
頁數6
期刊Langmuir
33
發行號5
DOIs
出版狀態已出版 - 7 2月 2017

指紋

深入研究「Extraordinarily Rapid Rise of Tiny Bubbles Sliding beneath Superhydrophobic Surfaces」主題。共同形成了獨特的指紋。

引用此