We perform 3D numerical simulations to demonstrate the presence of a bistability scenario for transversal migration of particles suspended in a viscoelastic liquid flowing in a pipe. Our results show that particle migration, either at the centerline or at the wall, can be controlled by the rheological properties of the suspending liquid and by the relative dimensions of the particle and tube. Proper selection of these parameters can promote strict aligning of particles on a line, i.e., 3-D focusing. Simple design rules are given to rationally control particle focusing under flow in micropipes.
Simulation of particle migration in tube flow in a viscoelastic fluid / Villone, M.; D'Avino, Gaetano; Hulsen, M. A.; Greco, Francesco; Maffettone, PIER LUCA. - (2010). (Intervento presentato al convegno 6th Annual European Rheology Conference tenutosi a Goteborg (SWEDEN) nel 07 – 09 April 2010).
Simulation of particle migration in tube flow in a viscoelastic fluid
Villone M.;D'AVINO, GAETANO;GRECO, FRANCESCO;MAFFETTONE, PIER LUCA
2010
Abstract
We perform 3D numerical simulations to demonstrate the presence of a bistability scenario for transversal migration of particles suspended in a viscoelastic liquid flowing in a pipe. Our results show that particle migration, either at the centerline or at the wall, can be controlled by the rheological properties of the suspending liquid and by the relative dimensions of the particle and tube. Proper selection of these parameters can promote strict aligning of particles on a line, i.e., 3-D focusing. Simple design rules are given to rationally control particle focusing under flow in micropipes.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
