000014422 001__ 14422
000014422 005__ 20161115100151.0
000014422 04107 $$aeng
000014422 046__ $$k2016-08-21
000014422 100__ $$aPak, On, Shun
000014422 24500 $$aPropulsive thrust of a driven filament at low Reynolds number with non-uniform flexibility

000014422 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014422 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014422 506__ $$arestricted
000014422 520__ $$2eng$$aIn the low Reynolds number regime, actuating a rigid filament periodically at one end leads to a reciprocal motion and hence produces no propulsive force. Instead if the filament is flexible viscous forces lead to a deformation of the filament and the generation of a net propulsive force (thrust). For a given actuation frequency and filament length, an optimal bending modulus of the filament can be determined to produce the largest propulsive force. Here we explore the possibility of further improving the propulsive performance by allowing variable flexibility along the filament. We demonstrate that by simply dividing a filament into two segments with different bending rigidity a higher propulsive force can be obtained compared with the case of uniform stiffness. The results suggest the possibility of exploiting this new degree of freedom for enhancing propulsion at low Reynolds numbers.

000014422 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014422 653__ $$a

000014422 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014422 720__ $$aPak, On, Shun
000014422 8560_ $$ffischerc@itam.cas.cz
000014422 8564_ $$s169991$$uhttps://invenio.itam.cas.cz/record/14422/files/TS.FM01-4.06.pdf$$yOriginal version of the author's contribution as presented on CD,  page 452, code TS.FM01-4.06
.
000014422 962__ $$r13812
000014422 980__ $$aPAPER