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Direct numerical simulations of two-phase immiscible wakes

Abstract : Tammisola et al (2012 J. Fluid Mech. 713 632-58) have observed a counter-intuitive destabilizing effect of the surface tension in planar wakes by means of a global linear analysis. In the present study, we conduct direct numerical simulation (DNS) of wakes of two immiscible fluids. The numerical scheme is based on a level set approach to track the interface position. We simulate both sinuous and varicose perturbations of wake flows. DNS confirms a destabilization on the sinuous perturbations in presence of a moderate amount of the surface tension, while wakes are stabilized when the surface tension is further increased. Varicose perturbations present in contrast an intermittent low-amplitude oscillatory regime which does not significantly affect the position of the interface.
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Contributor : Magalie Prudon Connect in order to contact the contributor
Submitted on : Monday, July 21, 2014 - 10:16:45 AM
Last modification on : Thursday, August 4, 2022 - 4:58:00 PM

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Luca Biancofiore, François Gallaire, Patrice Laure, Elie Hachem. Direct numerical simulations of two-phase immiscible wakes. Fluid Dynamics Research, IOP Publishing, 2014, 46 (4), pp.Article number 041409. ⟨10.1088/0169-5983/46/4/041409⟩. ⟨hal-01026220⟩



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