Keywords: inkjet printing, bubbles, drop formation, air entrainment, impact
Piezo-acoustic inkjet printing has become a mature technique for high performance printing. Nevertheless, there are still various scientific challenges. In this overview talk I will cover some of them:
(i) Coupling between the fluid dynamics and the acoustics, in particular when a disturbing bubble has been entrained in the ink channel.
(ii) Optical and acoustical monitoring of the bubble.