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Partial universality: Pinch-off dynamics in fluids with smectic liquid crystalline order

Cornell Affiliated Author(s)

Author

J.R. Savage
M. Caggioni
P.T. Spicer
Itai Cohen

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. © 2010 The Royal Society of Chemistry.

Date Published

Journal

Soft Matter

Volume

6

Issue

5

Number of Pages

892-895,

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-77249114398&doi=10.1039%2fb923069f&partnerID=40&md5=c946094b14717ba5aa2b51f152b8c7cb

DOI

10.1039/b923069f

Group (Lab)

Itai Cohen Group

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