Numerical study of a flapping liquid sheet sheared by a high-speed stream. (December 2015)

• Record Type: Journal Article
• Authors: Odier, Nicolas; Balarac, Guillaume; Corre, Christophe; Moureau, Vincent
• Is Part Of: International journal of multiphase flow. Volume 77(2015)
• Page Start: 196
• Page End: 208
• Publication Date: 2015-12
• Subjects: Two-phase flow -- Flapping liquid sheet -- Vortical structures -- Sensibility study -- Boundary-layer thickness; Multiphase flow -- Periodicals; Écoulement polyphasique -- Périodiques; Multiphase flow; Periodicals; 620.1064
• DOI: 10.1016/j.ijmultiphaseflow.2015.08.001
• Languages: English
• ISSNs: 0301-9322

Abstract

Abstract: 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.