Does shear flow stabilize an immersed thread?

Gunawan, Agus Yodi; Molenaar, Jaap; Ven, van de Aaf Fons

doi:10.1016/j.euromechflu.2004.09.002

Cited by 7 publications

(9 citation statements)

References 15 publications

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“…As the breakup time is linear in the capillary number and the convection time is x/4 ¼ 2.5, this would give Ca crit ¼ 0.0146, which is even even lower. On the other hand, the reported value of 0.164 by Gunawan et al 27 and 0.18 by Frischknecht 26 overestimate the critical value we find here. All in all, we conclude that Eq.…”

Section: -12contrasting

confidence: 55%

“…A detailed study of the critical capillary number as function of all the parameters is beyond the scope of this study, but we want to establish how close our simulations are to other estimates. The reported value of 0.164 by Gunawan et al 27 and 0.18 by Frischknecht 26 overestimate the critical value we find here (0.075) by a factor of 2 to 2.5. However, both studies do not take into account the initial amplitude of the disturbance a 0 .…”

Section: -12contrasting

confidence: 44%

“…Fluids 24, 012102 (2012) number of 0.18 for k ¼ 1; Gunawan et al 27 reported this to be 0.16 above which infinitely long equi-viscous threads are always stable in shear flow.…”

Section: -2mentioning

confidence: 99%

“…(27) gives Ca crit ¼ 0.0197, which is an underestimation of about a factor of 4. A slightly different estimate can be made by taking the breakup time as shown in Figure 9, which is 8.55 for Ca ¼ 0.05 there.…”

Section: -12mentioning

confidence: 99%

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Stability and breakup of confined threads

2012

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A boundary-integral method for periodic arrays of drops, threads or sheets between parallel walls is presented. The Green's functions take the form of a far-field HeleShaw description, which is used to generate periodic Green's functions for the parallel-wall configuration. The method is applied to study the effect of confinement on the breakup of threads. A comparison is made with classical Tomotika's theory and growth rates parallel and perpendicular to the walls are determined as a function of confinement ratio. Contrary to existing belief, we find that confined threads are not stable, but that the time for breakup increases with confinement and viscosity ratio, at least for threads whose diameter is smaller than the wallspacing. We also show the in-phase and out-of-phase breakup for an array of threads, as well as the stabilizing effect of shear flow.

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Section: -12contrasting

confidence: 55%

Section: -12contrasting

confidence: 44%

“…Fluids 24, 012102 (2012) number of 0.18 for k ¼ 1; Gunawan et al 27 reported this to be 0.16 above which infinitely long equi-viscous threads are always stable in shear flow.…”

Section: -2mentioning

confidence: 99%

Section: -12mentioning

confidence: 99%

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Stability and breakup of confined threads

2012

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“…However in comparison the stability of liquid-liquid jets has not been explored enough, even though such immersed jets are encountered in quite a few situations (Bar-Ziv & Moses, 1994;Bukman, Yao, & Wortis, 1996;Gunawan & Molenaar, 2005;Khakhar & Ottino, 1987). …”

Section: Introductionmentioning

confidence: 97%

Stability of immersed viscous liquid threads under electric field

Gadkari

Thaokar

2013

International Journal of Engineering Science

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Development of fibrillar morphology in immiscible PP/PS blends under shear flow

Yuan

Huang

et al. 2011

J of Applied Polymer Sci

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The formation dynamics of fibrillar morphology in dilute immiscible polypropylene (PP)/polystyrene blends under simple shear flow is investigated using optical-shear technique. Two strategies in generating fibrillar droplets under shear flow, namely temperature quench and shear jump, are studied. It is found that the shearinduced deformation of PP droplets is closely related to the total shear strain and changes of rheological properties of components during the temperature quench or shear-jump process. The shape evolution of fibrillar droplets under shear flow displays large deviation to the prediction of affine deformation theory based on Newtonian fluids and that of three deformation models, which consider the viscoelastic properties of components. The possible effect of droplet coalescence, breakup, and interfacial slip on the deviation between the experimental data and the prediction values for droplet deformation are discussed.

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Does shear flow stabilize an immersed thread?

Cited by 7 publications

References 15 publications

Stability and breakup of confined threads

Stability and breakup of confined threads

Stability of immersed viscous liquid threads under electric field

Development of fibrillar morphology in immiscible PP/PS blends under shear flow

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