Three-dimensional collapse and steady flow in thick-walled flexible tubes

Marzo, A., Luo, X.Y. and Bertram, C.D. (2005) Three-dimensional collapse and steady flow in thick-walled flexible tubes. Journal of Fluids and Structures, 20(6), pp. 817-835. (doi: 10.1016/j.jfluidstructs.2005.03.008)

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Three-dimensional collapse of and steady flow through finite-length elastic tubes are studied numerically. The Navier-Stokes equations coupled with large, nonlinear deformation of the elastic wall are solved by using the finite-element software, FIDAP. Three-dimensional solid elements are used for the elastic wall, allowing us to specify any wall thickness required. Plane-strain results for the cross-sectional shape of thinner-walled tubes are validated by comparison with published numerical data. Three-dimensional results for flow through finite-thickness tubes are in excellent agreement with published numerical results based on thin-shell elements, and are used to show the effects of varying wall thickness. Finally, the computational predictions are compared with experimental pressure–area relationships for thick-walled tubes. The simulations confirm a previously neglected experimental finding, that the Young wavespeed can be lower between buckling and osculation for thick tubes than for thinner ones.

Item Type:Articles
Keywords:Collapsible tube flow, Finite element methods, Buckling, Wavespeed
Glasgow Author(s) Enlighten ID:Luo, Professor Xiaoyu
Authors: Marzo, A., Luo, X.Y., and Bertram, C.D.
Subjects:Q Science > QA Mathematics
Q Science > QC Physics
College/School:College of Science and Engineering > School of Mathematics and Statistics > Mathematics
Journal Name:Journal of Fluids and Structures
Journal Abbr.:J. Fluid. Struct.
ISSN (Online):1095-8622
Published Online:28 July 2005

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