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Recktenwald SM, Haward SJ, Shen AQ, et al. Heterogeneous flow inside threads of low viscosity fluids leads to anomalous long filament lifetimes. Sci Rep. 2019;9(1):7110doi: 10.1038/s41598-019-43590-z.
Recktenwald, S. M., Haward, S. J., Shen, A. Q., & Willenbacher, N. (2019). Heterogeneous flow inside threads of low viscosity fluids leads to anomalous long filament lifetimes. Scientific reports, 9(1), 7110. https://doi.org/10.1038/s41598-019-43590-z
Recktenwald, Steffen M, et al. "Heterogeneous flow inside threads of low viscosity fluids leads to anomalous long filament lifetimes." Scientific reports vol. 9,1 (2019): 7110. doi: https://doi.org/10.1038/s41598-019-43590-z
Recktenwald SM, Haward SJ, Shen AQ, Willenbacher N. Heterogeneous flow inside threads of low viscosity fluids leads to anomalous long filament lifetimes. Sci Rep. 2019 May 08;9(1):7110. doi: 10.1038/s41598-019-43590-z. PMID: 31068644; PMCID: PMC6506508.
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Sci Rep. 2019 May 08;9(1):7110. doi: 10.1038/s41598-019-43590-z.

Heterogeneous flow inside threads of low viscosity fluids leads to anomalous long filament lifetimes.

Scientific reports

Steffen M Recktenwald, Simon J Haward, Amy Q Shen, Norbert Willenbacher

Affiliations

  1. Karlsruhe Institute of Technology, Institute for Mechanical Process Engineering and Mechanics, Gotthard-Franz-Straße 3, 76131, Karlsruhe, Germany. [email protected].
  2. Okinawa Institute of Science and Technology Graduate University, Micro/Nano/Biofluidics Unit, 1919-1 Tancha, Onna-son, Okinawa, 904-0495, Japan.
  3. Karlsruhe Institute of Technology, Institute for Mechanical Process Engineering and Mechanics, Gotthard-Franz-Straße 3, 76131, Karlsruhe, Germany.

PMID: 31068644 PMCID: PMC6506508 DOI: 10.1038/s41598-019-43590-z

Abstract

Formation and breakup of fluid threads is pervasive in nature and technology, where high extensibility of fluid filaments and extended filament lifetimes are commonly observed as a consequence of fluid viscoelasticity. In contrast, threads of low viscous Newtonian fluids like water rupture quickly. Here, we demonstrate that a unique banding instability during filament thinning of model surfactant solutions, with a viscosity close to water and no measurable elasticity, leads to extremely long filament lifetimes and to the formation of remarkably long threads. Complementary measurements in planar extension as well as in shear reveal that this flow instability is characterized by a multivalued stress, arising beyond a critical strain rate, irrespective of flow kinematics. Our work reports the first observation of such phenomena during extensional deformation and provides a unifying view on instabilities in complex flow fields.

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