Drop formation and breakup of low viscosity elastic fluids: Effects of molecular weight and concentration

By V. Tirtaatmadja, G. H. McKinley, Justin J. Cooper-White. 2006

447 citations recorded by the source corpus.

The dynamics of drop formation and pinch-off have been investigated for a series of low viscosity elastic fluids possessing similar shear viscosities, but differing substantially in elastic properties. On initial approach to the pinch region, the viscoelastic fluids all exhibit the same global necking behavior that is observed for a Newtonian fluid of equivalent shear viscosity. For these low viscosity dilute polymer solutions, inertial and capillary forces form the dominant balance in this potential flow regime, with the viscous force being negligible. The approach to the pinch point, which corresponds to the point of rupture for a Newtonian fluid, is extremely rapid in such solutions, with the sudden increase in curvature producing very large extension rates at this location. In this region the polymer molecules are significantly extended, causing a localized increase in the elastic stresses, which grow to balance the capillary pressure. This prevents the necked fluid from breaking off, as would occur i...

Subfields: Computational Mechanics, Electrical and Electronic Engineering, Surfaces, Coatings and Films

View Paper: https://www.semanticscholar.org/paper/c4be62fb9d828d3bb46d32f502f83a704d453ca6

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Computational Mechanics

In Electrical and Electronic Engineering

In Surfaces, Coatings and Films

Citations in the corpus

Formation of beads-on-a-string structures during break-up of viscoelastic filaments (2010, methodology): “For a given Oh, the morphology changes from a beaded structure to an axially uniform structure with increasing elasticity confirming the experimental observations of Tirtaatmadja et al.(13) The product, De·Oh = λtv/t(2)c , includes all three relevant time scales λ, tv, and tc entering the problem, a”
How dilute are dilute solutions in extensional flows (2006, methodology): “The scaling of the relaxation time with the educed concentration in this regime appears to obey the following relation proposed by irtaatmadja et al. 2006 : IG.”
The inertio-elastic planar entry flow of low-viscosity elastic fluids in micro-fabricated geometries (2005, methodology): “15 All measured values of the relaxation time were greater than those predicted according to Zimm theory, in which the relaxation time is given by [42]:”
Two-phase microfluidic flows (2011, background): “(Tirtaatmadja et al., 2006) investigated the droplet formation dynamics with the fluid from a nozzle of 2.”