Entrapped air bubbles in piezo-driven inkjet printing: their effect on the droplet velocity

J. Jong, de, R.J.M. Jeurissen, H. Borel, M. Berg, van den, M. Versluis, H.M.A. Wijshoff, A. Prosperetti, H. Reinten, D. Lohse

    Research output: Contribution to journalArticleAcademicpeer-review

    49 Citations (Scopus)
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    Abstract

    Air bubbles entrapped in the ink channel are a major problem in piezo-driven inkjet printing. They grow by rectified diffusion and eventually counteract the pressure buildup at the nozzle, leading to a breakdown of the jetting process. Experimental results on the droplet velocity udrop as a function of the equilibrium radius R0 of the entrained bubble are presented. Surprisingly, udrop(R0) shows a pronounced maximum around R0 = 17 µm before it sharply drops to zero around R0 = 19 µm. A simple one-dimensional model is introduced to describe this counterintuitive behavior which turns out to be a resonance effect of the entrained bubble.
    Original languageEnglish
    Pages (from-to)121511-1/7
    Number of pages7
    JournalPhysics of Fluids
    Volume18
    Issue number12
    DOIs
    Publication statusPublished - 2006

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