Unsteady flow of viscoelastic fluid modeled by beeds, springs and dampers

Takuji Ishikawa, Nobuyoshi Kawabata, Katsushi Fujita, Yutaka Miyake

Research output: Contribution to journalArticle

Abstract

Flow of viscoelastic fluid is commonly analyzed by using constitutive equati6ns. In this paper, bead-spring-damper macro model is proposed as an alternative to analyze viscoelastic flow. The tetrahedral structure of beads, springs and dampers models a gathering of interwined polymer chains. Behavior of the bead-spring-damper structure is computed under start-up flow, stop flow and oscillatory flow conditions. Stress overshoot, stress relaxation, dynamic viscosity and dynamic modulus are investigated. The results show that the effect of elasticity appears strongly in the unsteady flow, and that the bead-spring-damper macro model can express characteristics of viscoelastic fluid consistently.

Original languageEnglish
Pages (from-to)1287-1294
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume66
Issue number645
DOIs
Publication statusPublished - 2000 May

Keywords

  • Beed-spring-damper macro model
  • Fluid dynamics
  • Non-newtonian fluid
  • Numerical analysis
  • Unsteady flow
  • Viscoelastic fluid

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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