Unsteady parallel flows of an elasto-visco-hypoplastic fluid with oscillating boundary

Chung Fang, Cheng Hsien Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In the present study, an evolution equation for the Cauchy stress tensor is proposed to take elastic, viscous and plastic characteristics of complex fluids simultaneously into account. In particular, hypoplasticity is incorporated to account for the plastic features. The stress model is applied to investigate time-dependent flows of an elasto-visco-plastic fluid driven by an oscillating boundary with/ without an additional stationary boundary to study the cyclic responses and the model performance. Numerical simulations show that while different degrees of elastic and viscous effects can be captured by varying the model parameters, plastic deformation plays a significant role in the velocity distribution, and can be simulated appropriately by use of hypoplasticity. The stress model is capable of accounting for the combined elastic, viscous and plastic features of complex materials in transient motions, and applications may be found in geomorphic fluid motions like granular and debris flows, and flows involving polymers.

Original languageEnglish
JournalApplied Rheology
Volume18
Issue number4
Publication statusPublished - 2008

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parallel flow
Parallel flow
plastics
Plastics
Fluids
fluids
stress tensors
Velocity distribution
debris
Debris
plastic deformation
Tensors
Plastic deformation
Polymers
velocity distribution
Computer simulation
polymers
simulation

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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abstract = "In the present study, an evolution equation for the Cauchy stress tensor is proposed to take elastic, viscous and plastic characteristics of complex fluids simultaneously into account. In particular, hypoplasticity is incorporated to account for the plastic features. The stress model is applied to investigate time-dependent flows of an elasto-visco-plastic fluid driven by an oscillating boundary with/ without an additional stationary boundary to study the cyclic responses and the model performance. Numerical simulations show that while different degrees of elastic and viscous effects can be captured by varying the model parameters, plastic deformation plays a significant role in the velocity distribution, and can be simulated appropriately by use of hypoplasticity. The stress model is capable of accounting for the combined elastic, viscous and plastic features of complex materials in transient motions, and applications may be found in geomorphic fluid motions like granular and debris flows, and flows involving polymers.",
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Unsteady parallel flows of an elasto-visco-hypoplastic fluid with oscillating boundary. / Fang, Chung; Lee, Cheng Hsien.

In: Applied Rheology, Vol. 18, No. 4, 2008.

Research output: Contribution to journalArticle

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