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Viscoelastic relaxation in fluids
Bulletin of the Russian Academy of Sciences: Physics, 2015The shear elasticity of different fluids are studied experimentally at relatively low frequencies of 40 and 74 kHz. The real and imaginary shear moduli of several liquids are measured using the acoustic resonance method. A low-frequency viscoelastic relaxation process is assumed to occur in a fluid with a period of relaxation much longer than the ...
B. B. Badmaev +2 more
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1981
Most biofluids are viscoelastic. Our saliva, for example, behaves more like an elastic body than like water. Mucus, sputum, and synovial fluids are well known for their elastic behavior. Viscoelasticity is an important property of mucus. In the respiratory tract mucus is moved by cilia lining the walls of the trachea and bronchi.
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Most biofluids are viscoelastic. Our saliva, for example, behaves more like an elastic body than like water. Mucus, sputum, and synovial fluids are well known for their elastic behavior. Viscoelasticity is an important property of mucus. In the respiratory tract mucus is moved by cilia lining the walls of the trachea and bronchi.
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Flow Birefringence of Viscoelastic Fluids
Journal of the Physical Society of Japan, 1966The flow birefringence of the Rivlin-Ericksen viscoelastic fluid and of Noll's simple fluid is theoretically investigated. The Maxwell-Lorentz field equations, the mechanical field equations and the constitutive equations are reduced to simplified ones in the weak limit of the electromagnetic plane wave.
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Annular Effect in Viscoelastic Fluids
The Physics of Fluids, 1964In the oscillating motion of an incompressible viscoelastic fluid in a pipe, at high Reynolds number the root-mean-square axial velocity has its maximum value in a boundary layer at the wall of the tube. The elasticity of the fluid can make this annular effect much more pronounced than it is in the case of a Newtonian viscous fluid.
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2013
If the stresses in a fluid depend both on strains and on strain rates, the fluid is characterized as viscoelastic. In general the stresses in a viscoelastic fluid depend on the deformation: history the fluid has been subjected to. All real fluids are really viscoelastic because the pressure p is always a function of the volumetric strain.
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If the stresses in a fluid depend both on strains and on strain rates, the fluid is characterized as viscoelastic. In general the stresses in a viscoelastic fluid depend on the deformation: history the fluid has been subjected to. All real fluids are really viscoelastic because the pressure p is always a function of the volumetric strain.
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Local linear viscoelasticity of confined fluids
The Journal of Chemical Physics, 2007In this paper the authors propose a novel method to study the local linear viscoelasticity of fluids confined between two walls. The method is based on the linear constitutive equation and provides details about the real and imaginary parts of the local complex viscosity.
Hansen, J. S. +2 more
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Capillary filling dynamics of viscoelastic fluids
Physical Review E, 2014We consider the filling of a capillary by a viscoelastic fluid described by the Phan-Thien-Tanner (PTT) constitutive behavior. By considering both vertical capillary filling and horizontal capillary filling, we demarcate the role played by gravity and fluid rheology towards long-time oscillations in the capillary penetration depth. We also consider the
Aditya, Bandopadhyay +2 more
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Viscoelastic squeeze-film flows – Maxwell fluids
Journal of Fluid Mechanics, 1983An exact solution for the squeeze-film motion in an upper convected Maxwell fluid is given for both the plane and axisymmetric cases. Inertia and viseoelastic effects are included, and it is shown that the solution depends only on the product of the Weissenberg and Reynolds numbers.
Phan-Thien, N., Tanner, R. I.
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Dynamics of Viscoelastic Fluids
2011An evolution problem in a bounded domain for viscoelastic fluids of the kind considered in Chapters 7, 9, and 12 is now presented. Our attention is confined to infinitesimal viscoelasticity for isotropic, homogeneous, and incompressible fluids.
Giovambattista Amendola +2 more
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Convection in Viscoelastic Fluids
1988Nonequilibrium systems like Rayleigh-Benard convection in external temperature gradient or Taylor instability between rotating cylinders, have been much studied, theoretically and experimentally in recent years. Of particular interest are systems like Rayleigh-Benard convection in binary mixtures [1–5], or Taylor instability in counterrotating ...
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