TY - GEN
T1 - Fundamental characteristics of viscoelastic fluids simulated by a bead-spring-damper macro model with interaction
AU - Ishikawa, Takuji
AU - Kawabata, Nobuyoshi
AU - Fujita, Katsushi
AU - Miyake, Yutaka
N1 - Publisher Copyright:
© 2000 by ASME
PY - 2000
Y1 - 2000
N2 - The flow field of viscoelastic fluids is commonly analyzed by using constitutive equations. In this paper, a bead-spring-damper macro model with interaction is proposed as an alternative to analyze a viscoelastic flow. A tetrahedral structure of beads and springs models a gathering of intertwined polymer chains. Behavior of the macro model and the cluster is computed under a simple shear flow condition. Shear-thinning of viscosity, the mechanism of generation of normal stress differences and the effect of slip in the interaction are investigated. The results show that the elongation of clusters to the x direction is the mechanism of the normal stress differences generation, and that the slip in the interaction weakens the stresses. Consequently, it is found that the bead-spring-damper macro model can express the behavior of polymer chains in viscoelastic fluids and basic characteristics of viscoelastic fluids without using constitutive equations.
AB - The flow field of viscoelastic fluids is commonly analyzed by using constitutive equations. In this paper, a bead-spring-damper macro model with interaction is proposed as an alternative to analyze a viscoelastic flow. A tetrahedral structure of beads and springs models a gathering of intertwined polymer chains. Behavior of the macro model and the cluster is computed under a simple shear flow condition. Shear-thinning of viscosity, the mechanism of generation of normal stress differences and the effect of slip in the interaction are investigated. The results show that the elongation of clusters to the x direction is the mechanism of the normal stress differences generation, and that the slip in the interaction weakens the stresses. Consequently, it is found that the bead-spring-damper macro model can express the behavior of polymer chains in viscoelastic fluids and basic characteristics of viscoelastic fluids without using constitutive equations.
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U2 - 10.1115/IMECE2000-2705
DO - 10.1115/IMECE2000-2705
M3 - Conference contribution
AN - SCOPUS:85119868259
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
SP - 33
EP - 40
BT - Rheology and Fluid Mechanics of Nonlinear Materials
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2000 International Mechanical Engineering Congress and Exposition, IMECE 2000
Y2 - 5 November 2000 through 10 November 2000
ER -