Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session R45: Suspensions: Numerical Simulations
1:50 PM–3:34 PM,
Monday, November 20, 2023
Room: 209A
Chair: Jerzy Blawzdziewicz, Texas Tech University
Abstract: R45.00006 : Suspensions of viscoelastic capsules: effect of membrane viscosity on transient dynamics*
2:55 PM–3:08 PM
Presenter:
Fabio Guglietta
(University of Rome Tor Vergata and INFN)
Authors:
Fabio Guglietta
(University of Rome Tor Vergata and INFN)
Francesca Pelusi
(Italian National Research Council (CNR) - IAC)
Marcello Sega
(University College London (UCL))
Othmane Aouane
(Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11))
Jens Harting
(Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11))
In this contribution, we fill this gap by presenting a numerical investigation of the effect of MV on suspensions of viscoelastic capsules under simple shear flow, using a coupled immersed boundary-lattice Boltzmann implementation. We found that both the deformation and the loading time (i.e., the time it takes for the capsules to deform) are affected by the MV at varying values of the capillary number (Ca) and the volume fraction. Our simulations reveal the non-trivial role played by the MV in these systems. Specifically, while the effect of MV on the deformation and loading time is significant for dilute suspensions, it reduces as the volume fraction increases.
*This work was supported by the Italian Ministry of University and Research (MUR) under the FARE programme, project 'Smart-HEART'.
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