Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session D08: Bubbles: General
2:30 PM–4:40 PM,
Sunday, November 18, 2018
Georgia World Congress Center
Room: B213
Chair: Badarinath Karri, Indian Institute of Technology, Hyderabad
Abstract ID: BAPS.2018.DFD.D08.4
Abstract: D08.00004 : Bubble entrainment from acoustically driven meniscus shape deformations in a piezo-acoustic drop-on-demand inkjet nozzle*
3:09 PM–3:22 PM
Presenter:
Maaike Rump
(Univ of Twente)
Authors:
Maaike Rump
(Univ of Twente)
Tim Segers
(Univ of Twente)
Arjan Fraters
(Univ of Twente)
Roger Jeurissen
(Eindhoven University of Technology)
Marc van den Berg
(Océ-Technologies B.V.)
Hans Reinten
(Océ-Technologies B.V.)
Youri de Loore
(Océ-Technologies B.V.)
Herman Wijshoff
(Océ-Technologies B.V.)
Detlef Lohse
(Univ of Twente, Max Plank Institute for Dynamics and Self-Organization)
Michel Versluis
(Univ of Twente)
In piezo acoustic Drop-On-Demand (DOD) inkjet printing a single droplet is produced for each piezo driving pulse. A phenomenon that disturbs the droplet formation process is the entrainment of bubbles in the ink channel. Here, we study bubble entrainment during DOD inkjet printing as a result of meniscus deformations. We show that the fundamental low-frequency acoustic resonance mode of the ink channel (7 kHz) drives the high-amplitude meniscus motion and the corresponding concave meniscus shape. The higher frequency traveling acoustic waves (110 kHz) focus the flow at the concave meniscus which drives the meniscus shape deformations resulting in bubble entrainment. Depending on the piezo driving pulse length, we observe alternating windows of bubble entrainment and no bubble entrainment resulting from the interference of the high frequency acoustic waves that are mainly generated at the rising and falling edges of the piezo driving pulse.
*This work is part of an Industrial Partnership Programme of the Foundation for Fundamental Research on Matter (FOM), which is financially supported by the Netherlands Organisation for Scientific Research (NWO). This research program is co-financed by Océ-Technologies B.V., University of Twente, and Eindhoven University of Technology.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.D08.4
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