Dynamics of an elastoviscoplastic droplet in a Newtonian medium under shear flow
Daulet Izbassarov, Outi Tammisola
Abstract
A numerical study of an elastoviscoplastic (EVP) drop in Newtonian shear flow is presented. The three-dimensional Navier-Stokes equations are combined with the level-set method and the Saramito EVP model to study the yielding process under various nondimensional parameters. A regime map is obtained for the prediction of the yielded, unyielded, and partly yielded modes. It is shown that yielding is suppressed by a higher Bingham number but, surprisingly, also by a higher Weissenberg number.
Topics & Concepts
Weissenberg numberNewtonian fluidDrop (telecommunication)MechanicsViscoelasticityNon-Newtonian fluidMaterials scienceCapillary numberShear rateShear stressViscosityCapillary actionPhysicsComposite materialTelecommunicationsComputer scienceRheology and Fluid Dynamics StudiesFluid Dynamics and Heat TransferInnovative Microfluidic and Catalytic Techniques Innovation