Smith, FT;
(2017)
Free motion of a body in a boundary layer or channel flow.
Journal of Fluid Mechanics
, 813
pp. 279-300.
10.1017/jfm.2016.706.
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Abstract
Coupling is considered between fluid flow and a freely moving body shorter than the development length in an oncoming boundary layer or channel flow but longer than the flow thickness. The body lies within the core of the flow. The coupling occurs between the inviscid-dominated displacement and the viscous–inviscid pressure, the latter acting to move the body. This interaction can be unstable. It is found however that three factors serve to stabilise the interaction as each one alters the decisive balance of angular momentum. One is a 10 % shift forward in the position of the centre of mass. The second is a degree of flexibility in the body shape by means of its response to the induced pressure force. Third is a slight streamwise movement of the body which is sufficient to modify the viscous–inviscid pressure response and again produce stabilisation. The effects are largely independent of the lateral position of the body.
| Type: | Article |
|---|---|
| Title: | Free motion of a body in a boundary layer or channel flow |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1017/jfm.2016.706 |
| Publisher version: | https://doi.org/10.1017/jfm.2016.706 |
| Language: | English |
| Additional information: | This article has been published in a revised form in Journal of Fluid Mechanics [https://doi.org/10.1017/jfm.2016.706]. This version is free to view and download for private research and study only. Not for re-distribution, re-sale or use in derivative works. © 2017 Cambridge University Press. |
| Keywords: | Biomedical flows, instability control, swimming/flying |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Mathematics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1522252 |
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