Dynamics of electrospun hydrogel filaments in oscillatory microchannel flows: A theoretical and experimental approach | Zendy

A. N. Sankaran | Zendy; Sylwia Pawłowska | Zendy; Filippo Pierini | Zendy; Tomasz A. Kowalewski | Zendy; Alexander L. Yarin | Zendy

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Dynamics of electrospun hydrogel filaments in oscillatory microchannel flows: A theoretical and experimental approach

Author(s) -

A. N. Sankaran,

Sylwia Pawłowska,

Filippo Pierini,

Tomasz A. Kowalewski,

Alexander L. Yarin

Publication year - 2020

Publication title -

physics of fluids

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.188

H-Index - 180

eISSN - 1089-7666

pISSN - 1070-6631

DOI - 10.1063/5.0011005

Subject(s) - microchannel , physics , mechanics , brownian dynamics , thermal fluctuations , brownian motion , protein filament , flow (mathematics) , elastic modulus , bending , dynamics (music) , thermal , deformation (meteorology) , viscosity , viscous liquid , classical mechanics , statistical physics , thermodynamics , composite material , materials science , quantum mechanics , meteorology , acoustics

The dynamics of highly flexible micro- and nano-filaments are important to a variety of biological, medical, and industrial problems. The filament configuration variation and cross-stream migration in a microchannel are affected by thermal fluctuations in addition to elastic and viscous forces. Here, hydrogel nano-filaments with small bending Young’s moduli are utilized to elucidate the transitional behavior of elastic Brownian filaments in an oscillatory microchannel flow. A numerical model based on chain elastic dumbbells similar to the Rouse–Zimm model accounting for elastic, viscous, and random Brownian forces is proposed and implemented. In addition, a theoretical model to describe the average orientation–deformation tensor evolution for an ensemble of filaments in an oscillatory flow is proposed. The results are compared with the evolution observed in the experiments.

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