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

被引：5
|
作者：
Sankaran, A. [1 ]
Pawlowska, S. [2 ]
Pierini, F. [2 ]
Kowalewski, T. A. [2 ]
Yarin, A. L. [1 ]
机构：
[1] Univ Illinois, Dept Mech & Ind Engn, 842 W Taylor St, Chicago, IL 60607 USA
[2] Polish Acad Sci, Inst Fundamental Technol Res, Dept Biosyst & Soft Matter, PL-02106 Warsaw, Poland
来源：
PHYSICS OF FLUIDS | 2020年 / 32卷 / 07期
关键词：
POLYMERIC LIQUIDS;
D O I：
10.1063/5.0011005
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
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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页数：13
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