Electrohydrodynamics of compound liquid thread formation in a flow-focusing microchannel under an electric field DOI
Wei Yu, K. Shen, Xiangdong Liu

et al.

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(4)

Published: April 1, 2025

The electrohydrodynamics of compound liquid thread formation under an electric field in a flow-focusing microchannel is numerically studied via the phase-field method and dielectric model. influences potential flow rate on morphology size are clarified. A regime diagram provided to distinguish regimes (i.e., dripping–threading, jetting–threading, threading–threading regimes) from non-thread regimes. It found that force interfacial tension, both acting same direction, suppress growth inner phase. Conversely, these two forces oppose each other middle phase, counteracting capillary instability Therefore, larger contributes elongation stability jets, facilitating generation continuous thread. Moreover, as hinders phase front dripping regime, time droplet increased, while, jetting has stronger squeezing action neck thus reduces pinch-off droplet. Additionally, straightened widened with increasing number. In particular, control preferred jet template for producing peapod-like microfibers, scaling laws correspondingly developed predict radius outer thickness dripping–threading which achieve good precision relative error less than ±18%.

Language: Английский

Electrohydrodynamics of compound liquid thread formation in a flow-focusing microchannel under an electric field DOI
Wei Yu, K. Shen, Xiangdong Liu

et al.

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(4)

Published: April 1, 2025

The electrohydrodynamics of compound liquid thread formation under an electric field in a flow-focusing microchannel is numerically studied via the phase-field method and dielectric model. influences potential flow rate on morphology size are clarified. A regime diagram provided to distinguish regimes (i.e., dripping–threading, jetting–threading, threading–threading regimes) from non-thread regimes. It found that force interfacial tension, both acting same direction, suppress growth inner phase. Conversely, these two forces oppose each other middle phase, counteracting capillary instability Therefore, larger contributes elongation stability jets, facilitating generation continuous thread. Moreover, as hinders phase front dripping regime, time droplet increased, while, jetting has stronger squeezing action neck thus reduces pinch-off droplet. Additionally, straightened widened with increasing number. In particular, control preferred jet template for producing peapod-like microfibers, scaling laws correspondingly developed predict radius outer thickness dripping–threading which achieve good precision relative error less than ±18%.

Language: Английский

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