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**Nonlinear interfacial wave phenomena from the micro- to the macro-scale geometry-induced oscillations of finite bubbles in microchannels.** / Jisiou, M.; Dawson, G.; Thompson, A. B. et al.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Jisiou, M, Dawson, G, Thompson, AB, Mohr, S, Fielden, P, Hazel, AL & Juel, A 2014, 'Nonlinear interfacial wave phenomena from the micro- to the macro-scale geometry-induced oscillations of finite bubbles in microchannels', *Procedia IUTAM*, vol. 11, pp. 81-88. https://doi.org/10.1016/j.piutam.2014.01.050

Jisiou, M., Dawson, G., Thompson, A. B., Mohr, S., Fielden, P., Hazel, A. L., & Juel, A. (2014). Nonlinear interfacial wave phenomena from the micro- to the macro-scale geometry-induced oscillations of finite bubbles in microchannels. *Procedia IUTAM*, *11*, 81-88. https://doi.org/10.1016/j.piutam.2014.01.050

Jisiou M, Dawson G, Thompson AB, Mohr S, Fielden P, Hazel AL et al. Nonlinear interfacial wave phenomena from the micro- to the macro-scale geometry-induced oscillations of finite bubbles in microchannels. Procedia IUTAM. 2014;11:81-88. Epub 2014 Feb 1. doi: 10.1016/j.piutam.2014.01.050

@article{dcf12c9aec824eeaa152df380eba33c1,

title = "Nonlinear interfacial wave phenomena from the micro- to the macro-scale geometry-induced oscillations of finite bubbles in microchannels",

abstract = "We characterise novel propagation modes that occur when semi-infinite air fingers and finite air bubbles displace viscous fluid from microchannels. The presence of an axially-uniform rectangular occlusion within a rectangular cross-section leads to a mul- tiplicity of modes, in contrast to the single symmetric mode present in unoccluded channels. For air fingers, the asymmetric 1, oscillatory 2 and localised modes 3 first identified in millimetric channels persist at the micron-scale, confirming that significant gravitational effects are not necessary to support these states. Sufficiently large finite bubbles exhibit analogous modes with quanti- tatively similar flow measures, indicating that the physical mechanisms supporting the propagation modes of finite bubbles are the same as those identified for the air fingers 4. In contrast to the air fingers, in which oscillations are always initiated near the finger tip and propagate backwards, oscillations in finite bubbles can arise from either end of the bubble.",

keywords = "Microfluidics, Two-phase flow, Oscillating bubbles, Symmetry-breaking",

author = "M. Jisiou and G. Dawson and Thompson, {A. B.} and Stephan Mohr and Peter Fielden and Hazel, {A. L.} and A. Juel",

year = "2014",

doi = "10.1016/j.piutam.2014.01.050",

language = "English",

volume = "11",

pages = "81--88",

journal = "Procedia IUTAM",

issn = "2210-9838",

publisher = "Elsevier",

}

TY - JOUR

T1 - Nonlinear interfacial wave phenomena from the micro- to the macro-scale geometry-induced oscillations of finite bubbles in microchannels

AU - Jisiou, M.

AU - Dawson, G.

AU - Thompson, A. B.

AU - Mohr, Stephan

AU - Fielden, Peter

AU - Hazel, A. L.

AU - Juel, A.

PY - 2014

Y1 - 2014

N2 - We characterise novel propagation modes that occur when semi-infinite air fingers and finite air bubbles displace viscous fluid from microchannels. The presence of an axially-uniform rectangular occlusion within a rectangular cross-section leads to a mul- tiplicity of modes, in contrast to the single symmetric mode present in unoccluded channels. For air fingers, the asymmetric 1, oscillatory 2 and localised modes 3 first identified in millimetric channels persist at the micron-scale, confirming that significant gravitational effects are not necessary to support these states. Sufficiently large finite bubbles exhibit analogous modes with quanti- tatively similar flow measures, indicating that the physical mechanisms supporting the propagation modes of finite bubbles are the same as those identified for the air fingers 4. In contrast to the air fingers, in which oscillations are always initiated near the finger tip and propagate backwards, oscillations in finite bubbles can arise from either end of the bubble.

AB - We characterise novel propagation modes that occur when semi-infinite air fingers and finite air bubbles displace viscous fluid from microchannels. The presence of an axially-uniform rectangular occlusion within a rectangular cross-section leads to a mul- tiplicity of modes, in contrast to the single symmetric mode present in unoccluded channels. For air fingers, the asymmetric 1, oscillatory 2 and localised modes 3 first identified in millimetric channels persist at the micron-scale, confirming that significant gravitational effects are not necessary to support these states. Sufficiently large finite bubbles exhibit analogous modes with quanti- tatively similar flow measures, indicating that the physical mechanisms supporting the propagation modes of finite bubbles are the same as those identified for the air fingers 4. In contrast to the air fingers, in which oscillations are always initiated near the finger tip and propagate backwards, oscillations in finite bubbles can arise from either end of the bubble.

KW - Microfluidics

KW - Two-phase flow

KW - Oscillating bubbles

KW - Symmetry-breaking

U2 - 10.1016/j.piutam.2014.01.050

DO - 10.1016/j.piutam.2014.01.050

M3 - Journal article

VL - 11

SP - 81

EP - 88

JO - Procedia IUTAM

JF - Procedia IUTAM

SN - 2210-9838

ER -