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- W4386721990 abstract "Pulsating jet is one of the common working modes in electrohydrodynamic printing (EHDP) that process is highly affected by operating parameters and material properties. In this paper, the processes of pulsating jet for liquids with different physical properties were investigated using numerical simulation. An electrohydrodynamic solver was established, and a charge flux restricting step was adopted to ensure a realistic distribution of free charges. Three various ejection regimes were observed in our simulations: oscillating cone (OC), choked jet (CJ), and stable cone-jet (SJ). We found that three dimensionless numbers relating to liquid properties determined the ejection regime: the Ohnesorge number, Q0{epsilon}r/Q, and Q0/(QRe). Based on those dimensionless numbers, the roles of liquid properties on pulsating jet (OC and CJ) were analyzed. In OC, the break of the jet is due to the significant oscillation of the Taylor cone, which is mainly affected by viscosity and conductivity. In CJ, the jet emission is terminated by the excessive resistant force in the cone-jet transition region. For liquids with low and medium viscosity, the dominant resistant force is the polarization force or viscous force when {epsilon}rRe is larger or smaller than 1, respectively. For high viscosity liquids, the viscous force always becomes the major resistance. These results further reveal the physical mechanism of pulsating jet and can be used to guide its application." @default.
- W4386721990 created "2023-09-14" @default.
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- W4386721990 date "2023-09-12" @default.
- W4386721990 modified "2023-09-30" @default.
- W4386721990 title "Numerical study on the effects of fluid properties in electrohydrodynamic pulsating jet under constant voltage" @default.
- W4386721990 doi "https://doi.org/10.48550/arxiv.2309.06277" @default.
- W4386721990 hasPublicationYear "2023" @default.
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