An Immersed Boundary Method for a Contractile Elastic Ring in a Three-Dimensional Newtonian Fluid

Seunggyu Lee, Darae Jeong, Wanho Lee, Junseok Kim

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

In this paper, we present an immersed boundary method for modeling a contractile elastic ring in a three-dimensional Newtonian fluid. The governing equations are the modified Navier–Stokes equations with an elastic force from the contractile ring. The length of the elastic ring is time dependent and the ring shrinks with time because of its elastic nature in our proposed model. We dynamically reduce the number of Lagrangian boundary points when the distance between adjacent points is too small. This point-deleting algorithm helps keep the number of immersed boundary points in a single Cartesian mesh grid from becoming too high. We perform numerical experiments with various initial configurations of the contractile elastic ring, and numerical simulations to investigate the effects of the parameters are also conducted. The numerical results show that the proposed method can model and simulate the time-dependent contractile elastic ring in a three-dimensional Newtonian fluid.

Original languageEnglish
Pages (from-to)909-925
Number of pages17
JournalJournal of Scientific Computing
Volume67
Issue number3
DOIs
Publication statusPublished - 2016 Jun 1

Keywords

  • Contractile elastic ring
  • Immersed boundary method
  • Multigrid method
  • Navier–Stokes equation

ASJC Scopus subject areas

  • Software
  • Theoretical Computer Science
  • Numerical Analysis
  • Engineering(all)
  • Computational Theory and Mathematics
  • Computational Mathematics
  • Applied Mathematics

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