Fluid Mechanics and Acoustics Laboratory - UMR 5509

LMFA - UMR 5509
Laboratoire de Mécanique des Fluides et d’Acoustique
Lyon
France


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Home > Teams > Turbulence & Instabilities > Publications T&I et posters doctorants > Former five-year period > Publications T&I 2015

Article in Int. J. Multiph. Flow (2015)

Numerical study of a flapping liquid sheet sheared by a high-speed stream

Nicolas Odier, Guillaume Balarac, Christophe Corre & Vincent Moureau

Numerical study of a flapping liquid sheet sheared by a high-speed stream

A numerical study of a liquid sheet sheared on both sides by a high-speed stream is performed in this work, at moderate density and velocity ratio between phases. Near the injection, an interfacial wave develops on both interfaces of the liquid sheet. A vortical detachment of the high-speed stream is observed behind this wave and modifies the pressure field around the sheet. The global flapping mechanism is a consequence of the pressure difference between the two sides of the liquid sheet. The flapping dynamics is characterized and compared to existing correlations available in the literature. A sensitivity study of the flapping dynamics to the high-speed stream boundary layer thickness is performed and a relevant Strouhal number is proposed.
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