Particle stress in suspensions of soft objects

T. Krueger*, F. Varnik, D. Raabe

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In a suspension of extended objects such as colloidal particles, capsules or vesicles, the contribution of particles to the stress is usually evaluated by first determining the stress originating from a single particle (e. g. via integrating the fluid stress over the surface of a particle) and then adding up the contributions of individual particles. While adequate for a computation of the average stress over the entire system, this approach fails to correctly reproduce the local stress. In this work, we propose and validate a variant of the method of planes which overcomes this problem. The method is particularly suited for many-body interactions arising from, for example, shear and bending rigidity of red blood cells.

Original languageEnglish
Pages (from-to)2414-2421
Number of pages8
JournalPhilosophical Transactions A: Mathematical, Physical and Engineering Sciences
Volume369
Issue number1945
DOIs
Publication statusPublished - 28 Jun 2011

Keywords

  • lattice Boltzmann method
  • immersed boundary method
  • haemorheology
  • apparent viscosity
  • particle stress
  • method of planes
  • PRESSURE TENSOR
  • SIMULATIONS
  • VISCOSITY
  • EQUATION

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