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Issue 5, 2010
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Partial universality: pinch-off dynamics in fluids with smectic liquid crystalline order

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Abstract

Droplet pinch-off of fluids with liquid crystalline order is a common yet poorly understood process. We report on measurements of pinch-off dynamics for a lyotropic surfactant/water solution in the lamellar phase and a thermotropic liquid crystal in the smectic phase. We find pinch-off is universal and well described by a similarity solution for a strain thinning power-law fluid. This finding is consistent with bulk rheology measurements which show these materials shear thin with the appropriate power-law dependence. Remarkably, we find depending on material processing, this universal pinch-off cuts off at different length scales. Collectively, these phenomena lead to an exceptional form of singularity where pinch-off is both universal and dependent on initial conditions.

Graphical abstract: Partial universality: pinch-off dynamics in fluids with smectic liquid crystalline order

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Publication details

The article was received on 04 Nov 2009, accepted on 11 Dec 2009 and first published on 07 Jan 2010


Article type: Paper
DOI: 10.1039/B923069F
Citation: Soft Matter, 2010,6, 892-895
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    Partial universality: pinch-off dynamics in fluids with smectic liquid crystalline order

    J. R. Savage, M. Caggioni, P. T. Spicer and I. Cohen, Soft Matter, 2010, 6, 892
    DOI: 10.1039/B923069F

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