Vortex behavior in the inertial flow of viscoelastic fluids past a confined cylinder

Ju Min Kim, Chongyoup Kim, Changkwon Chung, Kyung Hyun Ahn, Seung Jong Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The effect of molecular parameters on the steady vortex behaviors in the inertial viscoelastic flow past a cylinder has been investigated. FENE-CR model was considered as a constitutive equation. A recently developed iterative solution method (Kim et al., (in press)) was found to be successfully applicable to the computation of inertial viscoelastic flows. The high-resolution computations were carried out to understand the detailed flow behaviors based on the efficient iterative solution method armed with ILU(O) type preconditioner and BiCGSTAB method. The discrete elastic viscous split stress-G/streamline upwind Petrov Galerkin (DEVSS-G/SUPG) formulation was adopted as a stabilization method. The vortex size decreased as elasticity increases. However, the vortex enhancement was also observed in the case of large extensibility, which means that the vortex behavior is strongly dependent upon the material parameters. The longitudinal gradient of normal stress was found to retard the formation of vortex, whereas the extensional viscosity played a role in the vortex enhancement. The present results are expected to be helpful for understanding the inertial vortex dynamics of viscoelastic fluids in the flow past a confined cylinder.

Original languageEnglish
Pages (from-to)117-128
Number of pages12
JournalKorea Australia Rheology Journal
Volume16
Issue number3
Publication statusPublished - 2004 Sep 1

Keywords

  • DEVSS-G/SUPG
  • FENE-CR
  • Flow past a confined cylinder
  • Iterative solver
  • Vortex behavior

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

Fingerprint Dive into the research topics of 'Vortex behavior in the inertial flow of viscoelastic fluids past a confined cylinder'. Together they form a unique fingerprint.

  • Cite this