Surface Bubbles in Micro- and Nanofluidics

Bram Borkent, Detlef Lohse

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

In this Proceeding we review and summarize recent findings of the Twente Physics of Fluids group on controlled cavitation of surface microbubbles [1-4] and surface nanobubbles [5] and in addition give some overview on the Twente findings on surface nanobubbles [6-9]. - Gas accumulation at liquid-solid interfaces can occur in the form of bubbles, for instance at a surface defect. The resulting micro- and nanoscale air pockets can act as nucleation sites in shockwave-induced cavitation experiments, leading to the random nature of cavitation, both in space and time. However, by controlling the size and the position of the defects, Bremond et al. [2; 3] succeeded to make cavitation perfectly reproducible both in time and space. This technique made it possible to study the dynamics of individual bubbles, bubble pairs, and bubble clusters emerging from the defects in an extremely reproducible fashion. In addition, by further minaturizing the pits down to diameters of 100nm, Borkent et al. [4] could measure the pressure at which these bubbles start to nucleate, giving results in perfect agreement with the theory by Atchley and Prosperetti [10]. In contrast, so-called surface nanobubbles, though comparible in size and volume to the bubbles in the nanopits, do not act as nucleation sites in cavitation experiments [5]. Finally, we report on some typical properties of surface nanobubbles [6] and report that they can be created in a reproducible and controllable way by electrolysis [8]. That suggests that these surface nanobubbles are in a dynamic equilibrium, i.e., gas in- and outflux are balanced. Such a dynamic stabilization has also been suggested for standard surface nanobubbles [11].
Original languageEnglish
Title of host publicationMechanics Down Under
Subtitle of host publicationProceedings of the 22nd International Congress of Theoretical and Applied Mechanics, held in Adelaide, Australia, 24 - 29 August, 2008
EditorsJames P. Denier, Matthew D. Finn
Place of PublicationDordrecht
PublisherSpringer
Pages117-134
ISBN (Electronic)978-94-007-5968-8
ISBN (Print)978-94-007-5967-1
DOIs
Publication statusPublished - 2008
EventXXII International Congress of Theoretical and Applied Mechanics, ICTAM 2008 - Adelaide, Australia
Duration: 24 Aug 200829 Aug 2008
Conference number: 22

Conference

ConferenceXXII International Congress of Theoretical and Applied Mechanics, ICTAM 2008
Abbreviated titleICTAM
CountryAustralia
CityAdelaide
Period24/08/0829/08/08

Keywords

  • Cavitation bubble
  • Surface bubble
  • Single bubbles
  • Bubble collapse
  • Bubble cluster

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  • Cite this

    Borkent, B., & Lohse, D. (2008). Surface Bubbles in Micro- and Nanofluidics. In J. P. Denier, & M. D. Finn (Eds.), Mechanics Down Under: Proceedings of the 22nd International Congress of Theoretical and Applied Mechanics, held in Adelaide, Australia, 24 - 29 August, 2008 (pp. 117-134). Dordrecht: Springer. https://doi.org/10.1007/978-94-007-5968-8_8