Chaotic oscillations of viscoelastic microtubes conveying pulsatile fluid

Ghayesh, Mergen, Farokhi, Hamed and Farajpour, Ali (2018) Chaotic oscillations of viscoelastic microtubes conveying pulsatile fluid. Microfluidics and Nanofluidics, 22. p. 72. ISSN 1613-4982

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Official URL: http://dx.doi.org/10.1007/s10404-018-2091-z

Abstract

As the first endeavour, the influence of a pulsatile flow on the large-amplitude bifurcation behaviour of viscoelastic microtubes subject to longitudinal pretention is studied with special consideration to chaos. The viscoelastic microtube is surrounded by a nonlinear spring bed. A modified size-dependent nonlinear tube model is developed based on a combination of the couple stress theory and the Euler–Bernoulli theory. Hamilton’s principle, as an equation derivation technique, and Galerkin’s procedure, as a discretisation technique, are used. Finally, the discretised differential equations of the pulsatile fluid-conveying viscoelastic microscale tube are solved using a time-integration approach. It is investigated that how the bifurcation response for both motions along the axial and transverse axes is highly dependent of the mean value and the amplitude of the speed of the pulsatile flow.

Item Type: Article
Uncontrolled Keywords: Microtubes, Bifurcation, Pulsatile flow, Nonlinear behaviour, Size effects
Subjects: H300 Mechanical Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Becky Skoyles
Date Deposited: 07 Aug 2018 08:49
Last Modified: 07 Aug 2018 10:15
URI: http://nrl.northumbria.ac.uk/id/eprint/35201

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