Effect of an entrained air bubble on the acoustics of an ink channel

Roger Jeurissen, Jos de Jong, Hans Reinten, Marc van den Berg, Herman Wijshoff, Michel Versluis, Detlef Lohse

Research output: Contribution to journalArticleAcademicpeer-review

24 Citations (Scopus)
34 Downloads (Pure)


Piezo-driven inkjet systems are very sensitive to air entrapment. The entrapped air bubbles grow by rectified diffusion in the ink channel and finally result in nozzle failure. Experimental results on the dynamics of fully grown air bubbles are presented. It is found that the bubble counteracts the pressure buildup necessary for the droplet formation. The channel acoustics and the air bubble dynamics are modeled. For good agreement with the experimental data it is crucial to include the confined geometry into the model: The air bubble acts back on the acoustic field in the channel and thus on its own dynamics. This two-way coupling limits further bubble growth and thus determines the saturation size of the bubble.
Original languageEnglish
Pages (from-to)2496-2505
Number of pages10
JournalThe Journal of the Acoustical Society of America
Issue number5
Publication statusPublished - 2008


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