Journal article

Drop formation dynamics of constant low-viscosity, elastic fluids

JJ Cooper-White, JE Fagan, V Tirtaatmadja, DR Lester, DV Boger

JOURNAL OF NON-NEWTONIAN FLUID MECHANICS | ELSEVIER SCIENCE BV | Published : 2002

Abstract

The dynamics of drop formation under gravity has been investigated as a function of elasticity using a set of low-viscosity, ideal elastic fluids and an equivalent Newtonian glycerol-water solution. All solutions had the same shear viscosity, equilibrium surface tension, and density, but differed greatly in elasticity. The minimum drop radius in the early stages of drop formation (necking) was found to scale as expected from potential flow theory, independent of the elasticity of the solutions. Thus, during this stage of drop formation when viscous force is still weak, the dynamics are controlled by a balance between inertial and capillary forces, and there is no contribution of elastic stre..

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