Journal
PHYSICS OF FLUIDS
Volume 25, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4790193
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Funding
- UK Engineering and Science Research Council (EPSRC) [EP/H018913/1]
- Engineering and Physical Sciences Research Council [EP/H018913/1] Funding Source: researchfish
- EPSRC [EP/H018913/1] Funding Source: UKRI
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Jets from drop-on-demand inkjet print-heads consist of a main drop with a trailing filament, which either condenses into the main drop, or breaks up into satellite drops. Filament behaviour is quantitatively similar to that of larger, free symmetrical filaments, and can be predicted from the aspect ratio and Ohnesorge number. Symmetrical filaments generated from inkjet print-heads show the same behaviour. A simple model, based on competition between the processes of axial shortening and radial necking, predicts the critical aspect ratio below which the jet condenses into a single drop. The success of this simple criterion supports the underlying physical model. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4790193]
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