Weakly nonlinear EHD stability of slightly viscous jet

Elcoot, Abd Elmonem Khalil

doi:10.1016/j.euromechflu.2008.04.004

Cited by 4 publications

(1 citation statement)

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“…Using the surface-connected prototype, the EHD instability of two superimposed liquids in a channel was scrutinized 4 . The EHD stability of an incompressible viscous fluid jet was presumed by a uniform longitudinal electric strength, using a weakly nonlinear approach 5 . The nonlinear boundary conditions were employed along with the linear fundamental equations of motion.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear EHD instability of two viscoelastic fluids under the influence of mass and heat transfer

Moatimid

Zekry

Ibrahim

2023

Sci Rep

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This study attempts to provide an approach to studying the nonlinear stability of a vertical cylindrical interface between two Oldroyd-B prototypes. An unchanged axial electric field influences the system, and porous medium, and the effects of heat and mass transfer (MHT) are considered. Hsieh's modulation and the viscous potential flow (VPT) are used to abbreviate the mathematical analysis. The viscoelastic Oldroyd-B model significant role in geothermal, engineering and industrial enhancement motivated us to carry out this in-depth investigation. The methodology of the nonlinear technique depends mainly on solving the linear equations of motion and applying the appropriate nonlinear boundary conditions. Numerous non-dimensional physical numbers are exposed using a non-dimensional technique. The stability conditions are theoretically achieved and numerically verified. As a limiting case, the linear dispersion equation is accomplished, and a set of stability diagrams is reachable. Together with the nonlinear stability method, a Ginzburg–Landau equation is derived. Subsequently, both theoretical and numerical methods are used to achieve the nonlinear stability criteria. Furthermore, a precise perturbed approach for surface deflection is achieved theoretically and numerically using the Homotopy perturbation method and the extended frequency conception. Along with the linear approach, it is found that the structure becomes unstable by the Laplace, Reynolds, Weber, and elasticity quantities as well as the linear MHT parameter. Furthermore, the stability zones are enhanced in the nonlinear instability approach.

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Section: Introductionmentioning

confidence: 99%