Axisymmetric and non-axisymmetric instability of an electrically charged viscoelastic liquid jet

Li, Fang; Yin, Xingyao; Yin, Xiaohong

doi:10.1016/j.jnnfm.2011.06.001

Cited by 38 publications

(19 citation statements)

References 35 publications

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“…The rheological equation of state relating the stress tensor to the velocity field is the Oldroyd B-constitutive equation [32][33][34], which is written in the objective reference frames as given below. It describes the fluid viscoelastic behavior:…”

Section: The Relationship Of Derived Dispersionmentioning

confidence: 99%

Linear stability analysis of a three-dimensional viscoelastic liquid jet surrounded by a swirling air stream

Yang

Tong

2013

Journal of Non-Newtonian Fluid Mechanics

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Section: The Relationship Of Derived Dispersionmentioning

confidence: 99%

Linear stability analysis of a three-dimensional viscoelastic liquid jet surrounded by a swirling air stream

Yang

Tong

2013

Journal of Non-Newtonian Fluid Mechanics

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“…5 (a) and 6 (a). The results are the same as the forenamed analysis (Li (2011), Yang (2013)). Figure 7 demonstrates the effect of the gas-liquid density ratio Q on the disturbance growth rate of the electrified liquid sheet by changing Q from 0.001 to 0.005, and other parameters kept constant to be Eu=1, Re1=510, We=100, l=1 for the electrified liquid sheet, and Eu=0 for the nonelectrified liquid sheet, respectively.…”

Section: Effect Of the Liquid Reynolds Numbermentioning

confidence: 99%

Effect of Viscous Gas on Stability of the Electrified Liquid Sheet

Duan

Liu

Wang

et al. 2018

JAFM

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An electrified liquid sheet was investigated by the linear analysis method. The sheet was injected into a dielectric viscous gas bounded by two horizontal parallel flat plates with a transverse electric field. To take into account the gas boundary layer thickness, the velocity profile of the liquid sheet must be considered and derived. By analyzing the liquid and gas domain, the relation between the growth rate and the wavenumbers for electrified liquid sheets was derived, and solved using the spectral method whose accuracy is higher than those of the finite element method and the finite difference method. Two modes, namely the sinuous mode and varicose mode were also investigated. The results revealed that the maximum growth rate of the sinuous disturbance wave is greater than that of the varicose one for the electrified liquid sheet. Moreover, the effects of the electrified Euler number and other parameters on the instability of the electrified liquid sheets have been tested. It is found that the growth rate is faster for an electrified liquid sheet than a non-electrified one. The electrical Euler number, the liquid Reynolds number, the Weber number and the momentum flux ratio can promote the breakup of a liquid sheet. However, the increase in the ratio l of the distance between the liquid sheet and flat plate to the liquid sheet thickness has an opposite influence with the other parameters.

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“…[ 19‐20 ] As a result, the fiber diameter decreases to the nanoscale level. [ 21‐22 ] In this context, an appropriate level of conductivity is required for solution electrospinning, thereby limiting polymer and solvent selection; this constraint lowers productivity to a few grams per day. [ 5,23 ]…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of gas‐assisted polymer‐melt electrospinning: Parametric study of a multinozzle system for mass production

Kwon

Yoon

Jeon

et al. 2020

Polymer Engineering & Sci

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In this study, we developed a multiphysics model for simulation of a gas‐assisted melt‐electrospinning (GAME) process, focusing on jet formation and propagation behavior. By numerically calculating the stresses acting on the jet during a single‐nozzle GAME process, the shear viscous stress was identified as the main factor with respect to jet stretch; thus, the relationship between shear viscous stress and jet thickness was investigated. The jet stretch ratio increased sharply when shear viscous stress reached the level at which jet sharpening occurred, leading to stable jet formation. We defined this stress as the critical shear viscous stress to determine stable spinnability. By imposing an electric field distribution calculated for a multi‐nozzle array (number of nozzles, tip‐to‐tip distance, and applied voltage) on the boundary condition of the single‐nozzle GAME simulation model, multinozzle GAME was simulated; this enabled proposal of a spinnability diagram for stable spinning.

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Axisymmetric and non-axisymmetric instability of an electrically charged viscoelastic liquid jet

Cited by 38 publications

References 35 publications

Linear stability analysis of a three-dimensional viscoelastic liquid jet surrounded by a swirling air stream

Linear stability analysis of a three-dimensional viscoelastic liquid jet surrounded by a swirling air stream

Effect of Viscous Gas on Stability of the Electrified Liquid Sheet

Numerical simulation of gas‐assisted polymer‐melt electrospinning: Parametric study of a multinozzle system for mass production

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