کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7061394 | 1459026 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of elasticity on the nonlinear collective dynamics of self-propelled particles
ترجمه فارسی عنوان
اثرات کشش بر روی پویایی غیرخطی جمعی ذرات خود ماشین
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کلمات کلیدی
میکروارگانیسم های شنا سازه های جمعی، تعامل هیدرودینامیکی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Some rodlike self-propelled particles form collective structures because of hydrodynamic interactions characterized by large-scale self-driven flows. Using a continuum fluid dynamics approach, the effects of elasticity on the pseudo-steady state dynamics of the collective patterns are studied. The Oldroyd-B and Jeffery constitutive models are used to represent the suspending fluid as examples of non shear-thinning viscoelastic fluids. A coupling between the fluid and particle dynamics leads to self-driven structures that are shorter and evolve irregularly in comparison with the long periodic correlated structures in Newtonian fluids. Inspired by turbulent drag reduction by polymers, a mechanism has been suggested for how elasticity restricts the formation of the self-driven collective structures. Viscoelasticity forces the system to transition from an “active” state to a “suppressed” state.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Newtonian Fluid Mechanics - Volume 214, December 2014, Pages 69-77
Journal: Journal of Non-Newtonian Fluid Mechanics - Volume 214, December 2014, Pages 69-77
نویسندگان
Yaser Bozorgi, Patrick T. Underhill,