Patlazhan S, Vagner S, Kravchenko I. Steady-state deformation behavior of confined composite droplets under shear flow.
PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2015;
91:063002. [PMID:
26172787 DOI:
10.1103/physreve.91.063002]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Indexed: 06/04/2023]
Abstract
The shear-induced dynamics of two-dimensional composite droplets in a narrow channel is investigated numerically. The droplets consist of a viscous inner droplet (core) and shell immersed in a continuous Newtonian fluid. Attention is focused on studying the effects of confinement at different core-to-shell radii ratios, relative viscosities of the medium components, and interfacial tensions on the steady-state deformation and orientation of a composite droplet. The role of the "sustaining" effect due to the internal core and competition between the near-wall shear flow and downward and upward secondary streams is discussed.
Collapse