Guglietta, Fabio;
Pelusi, Francesca;
Sega, Marcello;
Aouane, Othmane;
Harting, Jens;
(2023)
Suspensions of viscoelastic capsules: effect of membrane viscosity on transient dynamics.
Journal of Fluid Mechanics
, 971
, Article A13. 10.1017/jfm.2023.694.
Preview |
Text
Dense_suspension_of_viscoelastic_capsules.pdf - Other Download (34MB) | Preview |
Abstract
Membrane viscosity is known to play a central role in the transient dynamics of isolated viscoelastic capsules by decreasing their deformation, inducing shape oscillations and reducing the loading time, that is, the time required to reach the steady-state deformation. However, for dense suspensions of capsules, our understanding of the influence of the membrane viscosity is minimal. In this work, we perform a systematic numerical investigation based on coupled immersed boundary-lattice Boltzmann (IB-LB) simulations of viscoelastic spherical capsule suspensions in the non-inertial regime. We show the effect of the membrane viscosity on the transient dynamics as a function of volume fraction and capillary number. Our results indicate that the influence of membrane viscosity on both deformation and loading time strongly depends on the volume fraction in a non-trivial manner: dense suspensions with large surface viscosity are more resistant to deformation but attain loading times that are characteristic of capsules with no surface viscosity, thus opening the possibility to obtain richer combinations of mechanical features.
| Type: | Article |
|---|---|
| Title: | Suspensions of viscoelastic capsules: effect of membrane viscosity on transient dynamics |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1017/jfm.2023.694 |
| Publisher version: | https://doi.org/10.1017/jfm.2023.694 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10180455 |
Archive Staff Only
 |
View Item |
