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An integrated approach to modelling the fluid-structure interaction of a collapsible tube

Scroggs, R.A., Beck, S.B.M. and Patterson, E.A. (2004) An integrated approach to modelling the fluid-structure interaction of a collapsible tube. JSME International Journal, Series B: Fluids and Thermal Engineering, 47 (1). pp. 20-28. ISSN 1340-8054

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Abstract

The well known collapsible tube experiment was conducted to obtain flow, pressure and materials property data for steady state conditions. These were then used as the boundary conditions for a fully coupled fluid-structure interaction (FSI) model using a propriety computer code, LS-DYNA. The shape profiles for the tube were also recorded. In order to obtain similar collapse modes to the experiment, it was necessary to model the tube flat, and then inflate it into a circular profile, leaving residual stresses in the walls. The profile shape then agreed well with the experimental ones. Two departures from the physical properties were required to reduce computer time to an acceptable level. One of these was the lowering of the speed of sound by two orders of magnitude which, due to the low velocities involved, still left the mach number below 0.2. The other was to increase the thickness of the tube to prevent the numerical collapse of elements. A compensation for this was made by lowering the Young's modulus for the tube material. Overall the results are qualitatively good. They give an indication of the power of the current FSI algorithms and the need to combine experiment and computer models in order to maximise the information that can be extracted both in terms of quantity and quality.

Item Type: Article
Copyright, Publisher and Additional Information: Copyright (c) 2004 by The Japan Society of Mechanical Engineers. Uploaded here with permission from the publisher.
Keywords: Collapsible Experimental Fluid-structure interaction Modelling Tube Acoustic waves Collapsible tubes Computer simulation Confined flow Elastic moduli Fluid structure interaction Residual stress Fluid dynamics fluid flow interaction modeling structural analysis
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield)
Depositing User: Mr Christopher Hardwick
Date Deposited: 28 Aug 2009 12:24
Last Modified: 08 Feb 2013 16:59
Published Version: http://dx.doi.org/10.1299/jsmeb.47.20
Status: Published
Publisher: The Japan Society of Mechanical Engineers
Refereed: Yes
Identification Number: 10.1299/jsmeb.47.20
URI: http://eprints.whiterose.ac.uk/id/eprint/9116

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