Direct numerical simulations of two-phase immiscible wakes

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.


Published in:
Fluid Dynamics Research, 46, 4
Year:
2014
Publisher:
Bristol, Elsevier
ISSN:
0169-5983
Laboratories:




 Record created 2014-08-29, last modified 2018-03-17


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