Controlled Multibubble Surface Cavitation

N.P. Bremond, M. Arora, C.D. Ohl, D. Lohse

Research output: Contribution to journalArticleAcademicpeer-review

160 Citations (Scopus)
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Abstract

Heterogeneous bubble nucleation at surfaces has been notorious because of its irreproducibility. Here controlled multibubble surface cavitation is achieved by using a hydrophobic surface patterned with microcavities. The expansion of the nuclei in the microcavities is triggered by a fast lowering of the liquid pressure. The procedure allows us to control and fix the bubble distance within the bubble cluster. We observe a perfect quantitative reproducibility of the cavitation events where the inner bubbles in the two-dimensional cluster are shielded by the outer ones, reflected by their later expansion and their delayed collapse. Apart from the final bubble collapse phase (when jetting flows directed towards the cluster's center develop), the bubble dynamics can be quantitatively described by an extended Rayleigh-Plesset equation, taking pressure modification through the surrounding bubbles into account.
Original languageEnglish
Article number224501
Number of pages4
JournalPhysical review letters
Volume96
Issue number22
DOIs
Publication statusPublished - 2006

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