Computer-controlled Two-Roll Mill flow cell for the experimental study of particle and drop dynamics
Por:
Rosas, IY, Reyes, MAH, Minzoni, AA, Geffroy, E
Publicada:
1 ene 2015
Resumen:
In this paper, we present for the deformation of a drop under flow, using an experimental device based on the Two-Roll Mill geometry. To study the drop deformation for extended periods of time, the use of this device requires implementation of a non-linear control scheme that has not previously been used. The device and control scheme generate well characterized flow fields, which present a richness of behavior of the drop dynamics that smoothly varies from that observed in simple shear flows, where the vorticity dominates, to those observed in purely Hyperbolic flows. The Two-Roll Mill flow cell allows detailed studies such as the critical capillary number versus the critical viscosities ratio for elongational flows with significant vorticity. As well, the experimental device is able to track the time evolution of the drop shape permitting to study its complex time evolutions. Experiments were performed for sub-millimeter size drops with the determination of the surface tension with high accuracy. © 2014 Elsevier Inc.
Filiaciones:
Rosas, IY:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico
Reyes, MAH:
Univ Nacl Autonoma Mexico, Fac Ingn, Dept Termofluidos, Mexico City 04510, DF, Mexico
Minzoni, AA:
Univ Nacl Autonoma Mexico, FENOMEC, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 04510, DF, Mexico
Geffroy, E:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico
|