### Abstract

Original language | English |
---|---|

Pages (from-to) | 447-473 |

Number of pages | 27 |

Journal | Rheologica Acta |

Volume | 30 |

Issue number | 5 |

DOIs | |

Publication status | Published - 1991 |

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### Cite this

*Rheologica Acta*,

*30*(5), 447-473. https://doi.org/10.1007/BF00396530

}

*Rheologica Acta*, vol. 30, no. 5, pp. 447-473. https://doi.org/10.1007/BF00396530

**On some nearly viscometric flows of viscoelastic liquids.** / Siginer, A.

Research output: Contribution to journal › Article

TY - JOUR

T1 - On some nearly viscometric flows of viscoelastic liquids

AU - Siginer, A.

N1 - Cited By :11 Export Date: 21 June 2018

PY - 1991

Y1 - 1991

N2 - Superposition of oscillatory shear imposed from the boundary and through pressure gradient oscillations and simple shear is investigated. The integral fluid with fading memory shows flow enhancement effects due to the nonlinear structure. Closed-form expressions for the change in the mass transport rate are given at the lowest significant order in the perturbation algorithm. The elasticity of the liquid plays as important a role in determining the enhancement as does the shear dependent viscosity. Coupling of shear thinning and elasticity may produce sharp increases in the flow rate. The interaction of oscillatory shear components may generate a steady flow, either longitudinal or orthogonal, resulting in increases in flow rates akin to resonance, and due to frequency cancellation, even in the absence of a mean gradient. An algorithm to determine the constitutive functions of the integral fluid of order three is outlined. © 1991 Dr. Dietrich Steinkopff Verlag GmbH & Co. KG.

AB - Superposition of oscillatory shear imposed from the boundary and through pressure gradient oscillations and simple shear is investigated. The integral fluid with fading memory shows flow enhancement effects due to the nonlinear structure. Closed-form expressions for the change in the mass transport rate are given at the lowest significant order in the perturbation algorithm. The elasticity of the liquid plays as important a role in determining the enhancement as does the shear dependent viscosity. Coupling of shear thinning and elasticity may produce sharp increases in the flow rate. The interaction of oscillatory shear components may generate a steady flow, either longitudinal or orthogonal, resulting in increases in flow rates akin to resonance, and due to frequency cancellation, even in the absence of a mean gradient. An algorithm to determine the constitutive functions of the integral fluid of order three is outlined. © 1991 Dr. Dietrich Steinkopff Verlag GmbH & Co. KG.

U2 - 10.1007/BF00396530

DO - 10.1007/BF00396530

M3 - Article

VL - 30

SP - 447

EP - 473

JO - Rheologica Acta

JF - Rheologica Acta

SN - 0035-4511

IS - 5

ER -