Rheology of a suspension of 1000 liquid capsules in channel flow

Prosenjit Bagchi, R. Murthy Kalluri, Sai K. Doddi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Three-dimensional numerical simulations are presented on the motion of large ensembles of deformable particles (up to 1096 in number) in a channel flow at small inertia. Particles are modeled as capsules, that is, liquid drops surrounded by elastic membranes. Unlike liquid drops where the fluid-fluid interface is characterized by isotropic surface tension, that of a capsule is governed by more complex constitutive laws. Here we assume that the capsule membrane follows the neo-Hookean constitutive law. The particle volume fraction considered is up to 29%. The numerical methodology is based on a mixed finite-difference/Fourier transform method for the flow solver and a front-tracking method for fluid/membrane interaction. In the simulations, the flow field is resolved using up to 288X288X288 grid points, and each particle surface is resolved by 1280 triangular elements. The simulations are computation- and data-intensive, and the first of their kind in the context of deformable capsule suspension. The database generated from the simulations provides a wealth of information on the dynamics of semi-dense suspension of liquid capsules, in particular, and of deformable particles, in general. Preliminary results on flow visualization, particle trajectory, deformation, mean velocity and suspension viscosity are presented.

Original languageEnglish (US)
Title of host publication2008 Proceedings of ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
Pages147-152
Number of pages6
EditionPART A
DOIs
StatePublished - 2009
Event2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008 - Boston, MA, United States
Duration: Oct 31 2008Nov 6 2008

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings
NumberPART A
Volume10

Other

Other2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
Country/TerritoryUnited States
CityBoston, MA
Period10/31/0811/6/08

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

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