Transient drop deformation upon startup of shear in viscoelastic fluids

Pengtao Yue, James J. Feng, Chun Liu, Jie Shen

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Recent experiments show that upon abrupt start of a shear flow, a suspended drop undergoes an overshoot in deformation if either the drop or the matrix is a polymeric fluid. Using a diffuse-interface formulation, we carry out two-dimensional numerical simulations that trace the origin of the transient to the mismatch of two time scales: a capillary time for drop deformation and a relaxation time for the polymers in the viscoelastic component. The results are in qualitative agreement with experiments.

Original languageEnglish (US)
Article number123101
Pages (from-to)1-6
Number of pages6
JournalPhysics of Fluids
Volume17
Issue number12
DOIs
StatePublished - Jan 1 2005

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shear
fluids
shear flow
relaxation time
formulations
polymers
matrices
simulation

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Yue, Pengtao ; Feng, James J. ; Liu, Chun ; Shen, Jie. / Transient drop deformation upon startup of shear in viscoelastic fluids. In: Physics of Fluids. 2005 ; Vol. 17, No. 12. pp. 1-6.
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Transient drop deformation upon startup of shear in viscoelastic fluids. / Yue, Pengtao; Feng, James J.; Liu, Chun; Shen, Jie.

In: Physics of Fluids, Vol. 17, No. 12, 123101, 01.01.2005, p. 1-6.

Research output: Contribution to journalArticle

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