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Single Drop Dynamics under Shearing Flow in Systems with a Viscoelastic Phase
Author(s) -
Sibillo Vincenzo,
Guido Stefano,
Greco Francesco,
Maffettone Pier Luca
Publication year - 2005
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200551003
Subject(s) - viscoelasticity , drop (telecommunication) , mechanics , shearing (physics) , newtonian fluid , shear flow , rheology , ellipsoid , materials science , non newtonian fluid , classical mechanics , physics , composite material , engineering , mechanical engineering , astronomy
In this article, we discuss the dynamics of a single drop immersed in an immiscible liquid, under an imposed shear flow. The two situations of a viscoelastic matrix with a Newtonian drop and of a viscoelastic drop in a Newtonian matrix are considered, both systems being characterized by a viscosity ratio equal to one, and by the same elasticity parameter. Experimental data are taken with a rheo‐optical computer‐assisted shearing device, allowing for drop observation from the vorticity direction of the shear flow. Data favourably compare with predictions of the recently proposed Maffettone‐Greco model, where the drop is described as a deforming ellipsoid.