ShearViscosity for a Debye-Hückel Plasma
P. Qu A A S
Institut für Theoretische Physik der Technischen Universität Dresden
(Z. Naturforsch. 23 a, 757—760  ; received 24 February 1968)
The Kubo formula for the shearviscosity of a Debye-Hückel plasma is evaluated by an extension
of ERNST'S method. In the main the result can be shown to be equivalent to the result derived by
BRAUN from the LENARD-BALESCU equation with the CHAPMAN-ENSKOG method. Moreover a correction
of BRAUN'S result can be given as caused by the particle interaction.
ShearViscosity of the Homologous Series of wCHBT (n = 0 -f 12)
in the Isotropic and Nematic Phases
J. Jadżyn, R. Dąbrowski3, K. Glumiak, and G. Czechowski
Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznan,
a Institue of Chemistry, Military University of Technology, Kaliskiego 2, 01-489 Warsaw, Poland
Reprint requests to Prof. J. J.; Fax: 4861-86 84 524; E-mail: firstname.lastname@example.org.
Z. Naturforsch. 55a, 6 3 7 - 6 4 0 (2000); received April 19, 2000
The paper presents results of shearviscosity
American Mineralogist, Volume 94, pages 975–980, 2009
0003-004X/09/0007–975$05.00/DOI: 10.2138/am.2009.3092 975
Shearviscosity and diffusion in liquid MgSiO3: Transport properties and implications for
terrestrial planet magma oceans
Dean nevins,1,* Frank J. spera,1 anD Mark s. Ghiorso2
1Department of Earth Science, University of California, Santa Barbara, California 93106, U.S.A.
2OFM Research-West, 7336 24th Avenue NE, Seattle, Washington 98115, U.S.A.
Molecular dynamics simulations using a pair-wise additive potential are implemented to investi
The aim of this paper is to present a new phenomenological rheological model suitable for the description of a wide class of viscoelastic fluids. Classical phenomenological models predict the relation shear viscosity vs. shear rate (or shear stress) for shear-thinning (or thickening) materials exhibiting smooth monotonous passage from the first - upper (lower) - Newtonian plateau to the second - lower (upper) - one. However, present state of non-Newtonian materials used in practice (ranging from aqueous surfactant solutions, bituminous materials, associative polymers, polymer thickeners, lacquers and gels, to some special disperse systems, etc.) evokes the need to describe this - for many materials non-monotonous - relation in the corresponding way, i.e. through the sufficiently simple phenomenological model with a moderate number of parameters. A six-parameter model enabling description of not only monotonous but also non-monotonous course of shear viscosity function against shear rate (stress) is proposed including physical characterisation of the parameters. This model describes not only extreme points (maximum or minimum) but also a possible appearance of intermediate Newtonian plateau or its indication. The meaning and influence of the individual six parameters is documented on the experimental data published in the literature. There is a good agreement of the model proposed with many different experimental data representing different rheological behaviour. The applicability of this model for a wide class of viscoelastic materials is its principal advantage over the hitherto published phenomenological models.
The rheological behaviour of PVC plastisols composed of a blend of suspension and micro-suspension resins in different proportions was investigated. The present work was mainly focused on the variation of the zero shear viscosity versus the concentration of the extender resin. Hence, the packing fraction Fm was evaluated using the Krieger-Dougherty equation. These experiments confirmed the major influence of particle size distribution concerning the decrease of viscosity for concentrated suspensions. In addition, a model based on the porosity model developed by Ouchiyama et al. (Ouchiyama N, Tanaka T: Porosity estimation for random packings of spherical particle”, Ind. Eng. Chem. Fundam. 23 (1984) 490-493) to predict the packing fraction in the case of multimodal lattices was successfully applied to our PVC plastisols formulations.
J. Non-Equilib. Thermodyn.
Vol. 14 (1989), pages 69-77
Correlation Method for the ShearViscosity off Fluid Mixtures at Moderate
R. Castillo, S. Castaneda
Inst, de Fisica, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico
Received 23 April 1987
Registration Number 434
Key Number 2201123
A method to predict the shearviscosity of fluid mixtures is described. The method
relies on the results of the Revised Enskog Theory for hard-sphere fluid mixtures
and the use of temperature and density dependent diameters to model each
Abhangigkeit der ersten Normalspannungsdifferenz
von Silikonolen von der Nullviskositat und dem
Dependance of the first normal stress difference
of silicone oils on zero-shearviscosity and
Es w urden die visk oelastisc hen Eigensc haften
von Si l ik onolen mit Molgew ic hten von 68 bis
164 kgj mol (M 20 000 bis 500 000) untersuc ht.
Die Abhangigk eit der ersten Normalspannungs
diff erenz von der Nul lviskositat und dem Mol
gew ic ht w urde experimentel l und durc h Ableiten
der Normalspannungs-Masterk urve erhalten
for the complex viscosity of polymer melts[J]. Rheologica Acta, 1988, 27(4):384-396.  Mckenna G B, Hadziioannou G, Lutz P, et al. Dilute solution characterization of cyclic polystyrene molecules and their zero-shearviscosity in the melt[J]. Macromolecules, 1987, 20(3):498-512.  Liu W, Budtova T. Dissolution of unmodified waxy starch in ionic liquid and solution rheological properties[J]. Carbohydrate Polymers, 2013, 93(1):199-206.  Pishvaei M, Graillat C, Mckenna T F, et al. Experimental investigation and phenomenological modeling of the viscosity
investigated as part o f studies on toughening of PBT. POs used for the study
were ethylene propylene rubber (EPR), low-density polyethylene (LDPE),
and high-density polyethylene (HDPE), whose deformabilities were different
at room temperature. It was observed that the particle size of PO in the
discrete phase was the smallest when the EAG content was 8~12 wL%. Shearviscosity o f the blends increased as the particle size was decreased. It seems
that the morphology and rheological properties of the blends were affected by
graft copolymers formed in situ from EAG and