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Viscoelastic Conjugated Polymer Fluids
Angewandte Chemie International Edition, 2019AbstractThe introduction of optoelectronic functions into viscoelastic polymers can yield highly sophisticated soft materials for biomedical devices and autonomous robotics. However, viscoelasticity and excellent optoelectronic properties are difficult to achieve because the presence of a large number of π‐conjugated moieties drastically stiffens a ...
Akira Shinohara +9 more
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SWIRLING FLOWS OF VISCOELASTIC FLUIDS
Computers & Structures, 1988Few problems in Newtonian fluid mechanics can match the attention which has been given to the study of the flow of a Newtonian fluid between two parallel plates rotating about a common axis. Most of these analyses are based on the similarity transformation of Kármán to study axisymmetric solutions. Recently, \textit{S. V.
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On the oldroid model of a viscoelastic fluid
Functional Analysis and Its Applications, 1999The author studies the following initial-boundary value problem: \(v_t(t, x)+ D(v)- \gamma_1\Delta v(t,x)- \gamma_2\Delta \int^t_0\exp(\alpha(s- t)) v(s, x) ds+ \nabla p(t,x)= f(t,x)\), \(\text{div }v(t, x)= 0\), \((t,x)\in Q\), \(\int_\Omega p(t,x) dx= 0\), \(t\geq 0\), \(v(0,x)= v_0(x)\), \(x\in\Omega\), \(v(t,x)= 0\), \(t\geq 0\), \(x\in\partial ...
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Issues In Viscoelastic Fluid Mechanics
Annual Review of Fluid Mechanics, 1990nt transient that may be many orders of magnitude longer than time scales associated with instrument inertia. Intrinsic material time scales can be identified with the dynamics of the macro molecular chains. Shaping processes for polymeric materials are usually carried out in the liquid state, often over times that are rapid relative to those ...
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Observability of viscoelastic fluids
Journal of Non-Newtonian Fluid Mechanics, 2010zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhou, Hong +3 more
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The Propagation of Vorticity in a Viscoelastic Fluid
Journal of Non-Newtonian Fluid Mechanics, 1985A layer of constant vorticity exists in an infinite space of incompressible isotropic viscoelastic fluid for which the shear stress for rectilinear shearing flows depends linearly on the history of the velocity gradient. At some instant of time the forces maintaining this flow are removed.
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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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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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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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Rayleigh–Benard convection of viscoelastic fluid
Applied Mathematics and Computation, 2003zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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