New criteria for filament breakup in droplet-on-demand inkjet printing using volume of fluid (VOF) method
作者： Sadegh Poozesh , Nelson Akafuah , Kozo Saito
DOI: 10.1007/S11814-015-0197-5
关键词: Nanotechnology 、 Inkjet printing 、 Inlet 、 Breakup 、 Nozzle 、 Protein filament 、 Volume of fluid method 、 Head (vessel) 、 Mechanics 、 Computer simulation 、 Chemistry
摘要: A volume of fluid (VOF) numerical study is presented in which new pi number-based criteria are discussed that identify and separate three different regimes for a droplet-on-demand (DOD) print-head system. trailing filament coalesces into the main droplet while breaks one or multiple satellite droplet(s). The simulation results compared with published large-scale experimental used 2 mm diameter inkjet nozzle head, roughly 50 times larger than actual outlets. Liquid break-up behavior predicted using combination two pi-numbers, including either Weber (We)-Ohnesorge (Oh) number couplets Reynolds (Re)-Weber (We) dependent only on ejected liquid properties velocity waveform at inlet. These have merit over currently existing ones require accurate measurements droplets to determine physical features like length [1].
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