Abstract Submitted for the DFD12 Meeting of The ... - Emmanuel Virot
Aug 2, 2012 - in the vertical case, suggesting an important role of gravity. ... flag can be also a mean to harvest the wind kinetic energy: in a preliminary ...
Abstract Submitted for the DFD12 Meeting of The American Physical Society
Nuances between flags fluttering in horizontal and vertical flows EMMANUEL VIROT, PASCAL HEMON, XAVIER AMANDOLESE, LadHyX, Ecole Polytechnique — When placed in a constant-velocity flow, a flag starts suddenly to flutter above a critical flow velocity. It appears that the same flag hanged horizontally or vertically exhibits different behaviors. The critical velocity is higher in the vertical case, suggesting an important role of gravity. To investigate the influence of length, width and thickness of paper flags, we perform experiments in both horizontal and vertical wind tunnels. The involvement of elasticity, fluid frictioninduced tension or gravity-induced tension on the flag flutter will be discussed. The flag can be also a mean to harvest the wind kinetic energy: in a preliminary approach, we measure and discuss periodic forces that a horizontal flapping flag produces on his shaft.
Emmanuel Virot LadHyX, Ecole Polytechnique Date submitted: 02 Aug 2012
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interplay among the participating subsystems. We also briefly describe some current research which uses a different approach to the coupled dynamics of the ...
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Finite element (FE) model of the acoustic space corresponding to the human vocal tract for Czech vowel /a/ and acoustic space around the human head was ...
