Results 241 to 250 of about 52,732 (296)

Viscoelastic Conjugated Polymer Fluids

Angewandte Chemie International Edition, 2019
AbstractThe 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, Chengjun Pan, Zhenfeng Guo, Liyang Zhou, Zhonghua Liu, Lei Du, Zhichao Yan, Florian J. Stadler, Lei Wang, Takashi Nakanishi   +9 more
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Sink Flows of Viscoelastic Fluids

Journal of Rheology, 1986
Both two-constant and three-parameter upper convected Maxwell-Oldroyd models of viscoelastic fluids are used in this analysis of spherical and cylindrical sink flows. For spherical sink flows the stresses rise rapidly initially and the stress levels attained are large but bounded, while for cylindrical sink flows the viscoelastic stresses are modest ...
Chakraborty, A. K., Metzner, A. B.
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Controlled Viscoelastic Carbon Nanotube Fluids

Journal of the American Chemical Society, 2008
It is generally assumed that some qualitative factors, including high organic fraction, size, density, and surface chemistry of the core etc., will dominate the liquid-like behavior of the hybrid nanofluids. For quasi one-dimensional PEG-functionalized carbon nanotubes (PEG-CNTs), this paradigm may be quite different.
Youan, Lei, Chuanxi, Xiong, Hong, Guo, Junlong, Yao, Lijie, Dong, Xiaohong, Su   +5 more
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Incompressible Viscoelastic Fluids

1994
In Part I, we discussed in detail the foundations of the bracket description of dynamical behavior, demonstrating how the generalized bracket is linked to the theories of both Hamiltonian mechanics and irreversible thermodynamics. Now it is time to discuss the various applications towards seemingly complex systems which are the main focus of this book.
Antony N. Beris, Brian J. Edwards
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Polymerizable viscoelastic fluids

Journal of Polymer Science Part A: Polymer Chemistry, 1990
AbstractRheological, elongational flow, and scanning electron microscopy measurements have been performed on cationic monomers associated with specific counterions. The monomers are formed through the reaction of allyl bromide and a variety of dimethylalkylamine derivatives.
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Issues In Viscoelastic Fluid Mechanics

Annual Review of Fluid Mechanics, 1990
nt 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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A model viscoelastic fluid

Polymer Engineering & Science, 1978
Abstract Shear stress and first normal stress difference data are presented for materials which exhibit a constant viscosity and yet at the same time exhibit elasticity levels of the same order as polymer melts. Flow pattern observations in circular die entry flows in conjunction with independent shear and normal stress measurement ...
David V. Boger, Hang Nguyen
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SWIRLING FLOWS OF VISCOELASTIC FLUIDS

Computers & Structures, 1988
Few 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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Rayleigh–Benard convection of viscoelastic fluid

Applied Mathematics and Computation, 2003
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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