Transient drop deformation upon startup of shear in viscoelastic fluids

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

doi:10.1063/1.2139630

Transient drop deformation upon startup of shear in viscoelastic fluids

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

Research output: Contribution to journal › Article › peer-review

40 Scopus citations

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 language	English (US)
Article number	123101
Pages (from-to)	1-6
Number of pages	6
Journal	Physics of Fluids
Volume	17
Issue number	12
DOIs	https://doi.org/10.1063/1.2139630
State	Published - 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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10.1063/1.2139630

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title = "Transient drop deformation upon startup of shear in viscoelastic fluids",

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.",

author = "Pengtao Yue and Feng, {James J.} and Chun Liu and Jie Shen",

note = "Funding Information: Acknowledgment is made to the Donors of The Petroleum Research Fund, administered by the American Chemical Society, for partial support of this research. J.J.F. was also supported by the NSF (CTS-0229298, CTS-9984402), the NSERC, the Canada Foundation for Innovation, the Canada Research Chair program, and the NNSF of China (No. 20490220). J.S. was supported by the NSF (DMS-0074283, DMS-0311915). C.L. was supported by the NSF (DMS-0405850). We acknowledge discussions with Professor F. Greco, Professor P. L. Maffettone, and Professor M. Simeone.",

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doi = "10.1063/1.2139630",

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AU - Shen, Jie

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PY - 2005/12

Y1 - 2005/12

N2 - 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.

AB - 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.

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Transient drop deformation upon startup of shear in viscoelastic fluids

Abstract

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