Capillary Break-up Rheometry of Low-Viscosity Elastic Fluids
نویسندگان
چکیده
منابع مشابه
Capillary Break-up Rheometry of Low-Viscosity Elastic Fluids
We investigate the dynamics of the capillary thinning and break-up process for low viscosity elastic fluids such as dilute polymer solutions. Standard measurements of the evolution of the midpoint diameter of the necking fluid filament are augmented by high speed digital video images of the break up dynamics. We show that the successful operation of a capillary thinning device is governed by th...
متن کاملVisco-Elasto-Capillary Thinning and Break-Up of Complex Fluids
The progressive break-up of an initially stable fluid column or thread into a number of smaller droplets is an important dynamical process that impacts many commercial operations from spraying and atomization of fertilizers and pesticides, to paint application, roll-coating of adhesives and food processing operations such as containerand bottle-filling. The progressive thinning of a fluid filam...
متن کاملThe Inertio-Elastic Planar Entry Flow of Low-Viscosity Elastic Fluids in Micro-fabricated Geometries
The non-Newtonian flow of dilute aqueous polyethylene oxide (PEO) solutions through micro-fabricated planar abrupt contraction–expansions is investigated. The small lengthscales and high deformation rates in the contraction throat lead to significant extensional flow effects even with dilute polymer solutions having time constants on the order of milliseconds. By considering the definition of t...
متن کاملDrop Formation and Breakup of Low Viscosity Elastic Fluids: Effects of Molecular Weight and Concentration
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 behaviour that is observed for a Newtonian fluid of equivalent shear viscosity. For these low ...
متن کاملExtensional flow of low-viscosity fluids in capillary bridges formed by pulsed surface acoustic wave jetting
Forming capillary bridges of low-viscosity (.10mPa s) fluids is difficult, making the study of their capillary-thinning behavior and the measurement of the fluid’s extensional viscosity difficult as well. Current techniques require some time to form a liquid bridge from the stretching of a droplet. Rapidly stretching a liquid bridge using these methods can cause its breakup if the viscosity is ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Applied Rheology
سال: 2005
ISSN: 1617-8106
DOI: 10.1515/arh-2005-0001