title: Modeling breakup and relaxation of Newtonian droplets using the advected phase-field approach.
abstract: The relaxation and breakup of Newtonian droplets is considered using the advected field approach. This method allows one to follow the deformation of interfaces using an order parameter field [Biben, Europhys. Lett. 63, 623 (2003)] based on a Ginzburg-Landau equation. Using this method, it is possible to follow the breakup of droplets and stability curves can be obtained in both two- and three-dimensional shear and elongational flows. Finally, relaxation of a droplet is considered, following the application of an elongational flow. The results are compared with previous experimental data [Ha and Leal, Phys. Fluids 13, 1568 (2001)], and are found to be in satisfactory agreement. The method is general enough to be applied to other non-Newtonian fluids, such as Oldroyd-B fluids or viscoplastic materials.
authors.affiliation: Laboratoire de Spectrométrie Physique, Université Joseph Fourier Grenoble I and CNRS (UMR5588), 140 avenue de la physique, Boîte Postale 87, 38402 Saint Martin d'Hères cedex, France.
authors.forename: J
authors.initials: J
authors.lastname: Beaucourt
authors.forename: T
authors.initials: T
authors.lastname: Biben
authors.forename: A
authors.initials: A
authors.lastname: Leyrat
authors.forename: C
authors.initials: C
authors.lastname: Verdier