A Pitching Foil with a Flexible flap Creates an Orderly Jet
Fluid Dynamics
2010-10-19 v1
Abstract
We experimentally studied the effect of flexibility on the flow produced by sinusoidally pitching foil in quiescent fluid. The rigid foil produces a weak, divergent and meandering jet. On the contrary, the foil with a flexible flap produces an orderly, narrow, coherent jet. It has been observed that such orderly jet is produced when the flap has appropriate flexibility. The jet produced in quiescent fluid by the flexible foil is accompanied by a corresponding thrust. In that sense, this is simple and different type of hovering.
Cite
@article{arxiv.1010.3577,
title = {A Pitching Foil with a Flexible flap Creates an Orderly Jet},
author = {Sachin Y. Shinde and Jaywant H. Arakeri},
journal= {arXiv preprint arXiv:1010.3577},
year = {2010}
}
Comments
Two videos are uploaded: 1) "FLEXIBLE_FOIL_JET" in MPEG1 format 2) "FLEXIBLE_FOIL_JET_long" in MPEG4 format for APS-DFD conference - Gallery of fluid motion