Transient drop deformation upon startup of shear in viscoelastic fluids

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

Research output: Contribution to journalArticlepeer-review

40 Scopus citations


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
Issue number12
StatePublished - Dec 2005

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes


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