Numerical simulations of dispersive mixing of viscoelastic suspensions in a four-roll mill

Numerical simulations of dispersive mixing of viscoelastic suspensions in a four-roll mill The dispersive mixing of particles suspended in Newtonian and viscoelastic fluids in a four-roll mill is studied by direct numerical simulations. A fictitious domain method is used to handle the particle motion. To quantify the mixing, a proper mixing distribution function is defined. The combined effect of fluid rheology and particle-particle/particle-wall hydrodynamic interactions is addressed. At variance with the Newtonian case where the particle distribution remains uniform, the viscoelasticity-induced migration leads to a significant segregation process. The effect of the Deborah number (the product of the fluid relaxation time and the roll angular velocity), shear-thinning, particle concentration, and size on the microstructure evolution is thoroughly investigated. Rheologica Acta Springer Journals

Numerical simulations of dispersive mixing of viscoelastic suspensions in a four-roll mill

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Springer Berlin Heidelberg
Copyright © 2017 by Springer-Verlag GmbH Germany
Materials Science; Characterization and Evaluation of Materials; Polymer Sciences; Soft and Granular Matter, Complex Fluids and Microfluidics; Mechanical Engineering; Food Science
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