Publication de 12 numéros par an
ISSN Imprimer: 1044-5110
ISSN En ligne: 1936-2684
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TWO-DIMENSIONAL INSTABILITY RESPONSE OF AN ELECTRIFIED VISCOELASTIC PLANAR LIQUID SHEET SUBJECTED TO UNRELAXED AXIAL ELASTIC TENSION
RÉSUMÉ
The viscoelastic liquid sheet can present novel, if reasonable, behavior when subjected to noticeable unrelaxed axial tension, which has not been considered in previous studies on electrospraying. The temporal instability of electrified viscoelastic planar liquid sheets, subjected to unrelaxed axial tension, is investigated here for varicose and sinuous disturbances. The Oldroyd eight-constant model is used to describe the rheological characteristics of the viscoelastic fluids. The corresponding dispersion relation between wave growth rate and wave number is derived using linear analysis. From inspection of the analysis, the present theory suggests that electrified viscoelastic sheets with reasonable values of parameters can behave with greater stability than corresponding Newtonian sheets for varicose disturbances and sinuous disturbances; this coincides with most experimental evidence that the addition of polymers generally stabilizes the liquid sheet and delays breakup. In addition, an electrified viscoelastic liquid sheet can be stabilized by decreasing the electrical Euler number or increasing the distance between the flat electrode and the liquid sheet.
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Jia Kun, Sun Dejun, The spatial-temporal instability behavior of an electrified viscoelastic liquid sheet, IOP Conference Series: Materials Science and Engineering, 222, 2017. Crossref
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Zhang Shu, Lan Xu-dong, Zhou Ming, Thermocapillary instability of a liquid sheet with centrifugal force, Journal of the Brazilian Society of Mechanical Sciences and Engineering, 40, 2, 2018. Crossref
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El-Sayed Mohamed Fahmy, Alanzi Agaeb Mahal, Electrohydrodynamic Liquid Sheet Instability of Moving Viscoelastic Couple-Stress Dielectric Fluid Surrounded by an Inviscid Gas through Porous Medium, Fluids, 7, 7, 2022. Crossref