Nonisothermal extrusion under continuous shear of liquids with an anomalous viscosity characteristic

1971 ◽  
Vol 21 (2) ◽  
pp. 1045-1051
Author(s):  
S. A. Bostandzhiyan ◽  
V. I. Boyarchenko ◽  
G. N. Kargapolova
Keyword(s):  
Anomalous Viscosity ◽  
Viscosity Characteristic ◽  
Continuous Shear

Effect of PAO-Based γ-Fe2O3 and Surfactant Concentration on Viscosity Characteristic

2013 ◽  
Vol 284-287 ◽  
pp. 265-270
Author(s):  
Siti Asma’ Nikmat Leong ◽  
Pakharuddin Mohd Samin ◽  
Ani Idris ◽  
Muhamad Asri Azizul ◽  
Effaliza Misran
Keyword(s):  
Surfactant Concentration ◽  
Precipitation Method ◽  
Obvious Effect ◽  
Coating Agent ◽  
Rheological Measurement ◽  
Casson Model ◽  
Viscosity Characteristic ◽  
Preliminary Study ◽  
Co Precipitation ◽  
Newtonian Behavior

This is a preliminary study on the viscosity characteristics of polyalphaolefin (PAO)-based γ-Fe2O3 under zero magnetic fields. By varying the concentration of magnetic nanoparticles (MNPs), PAO-based γ-Fe2O3 with different concentrations were synthesized by co-precipitation method. The effect of this factor on the viscosity characteristic of γ-Fe2O3 (< 30 nm) was investigated on the basic of a series of rheological measurement. The use of oleic acid (OA) as a coating agent and surfactant was also investigated by varying its concentration. The results show the concentration of MNPs and the amount of OA has obvious effect on viscosity characteristics of PAO-based γ-Fe2O3. In the case of comparison between the concentrations of MNPs, higher concentration of MNPs increased the viscosity of the PAO-based γ-Fe2O3 and exhibit nearly Newtonian behavior. The large amount of OA also exhibits the increment on viscosity characteristic of MNPs. The experimental data were compared with the Bingham and Casson model and the results revealed that the rheology of the polyalphaolefin (PAO)-based γ-Fe2O3 fitted the Casson model better.

FEM Analysis of Bridges with Encased Continuous Shear Connectors

ce/papers ◽  
2021 ◽  
Vol 4 (2-4) ◽  
pp. 731-735
Author(s):  
Patricia Vanova ◽  
Vincent Kvocak ◽  
Viktoria Kozlejova ◽  
Daniel Dubecky ◽  
Ruslan Kanishchev
Keyword(s):  
Fem Analysis ◽  
Shear Connectors ◽  
Continuous Shear

scholarly journals STUDIES ON THE ANOMALOUS VISCOSITY AND FLOW-BIREFRINGENCE OF PROTEIN SOLUTIONS

1944 ◽  
Vol 27 (3) ◽  
pp. 233-271 ◽  
Author(s):  
A. S. C. Lawrence ◽  
Margaret Miall ◽  
Joseph Needham ◽  
Shih-Chang Shen
Keyword(s):  
Film Flow ◽  
Surface Film ◽  
Mosaic Disease ◽  
Flow Birefringence ◽  
Bulk Phase ◽  
Protein Solutions ◽  
Amphibian Embryo ◽  
Anomalous Viscosity ◽  
Group A ◽  
Group B

1. An extensive investigation has been made of protein particle shape using the methods of flow-birefringence and anomalous viscosity measurement in the coaxial cell. 2. As a result of investigations on a number of proteins, it is concluded that they may be divided into four groups. Group A consists of those which show flow-anomaly both in the bulk phase and in the surface film. These also show flow-birefringence in the bulk phase. Examples: tobacco mosaic disease virus nucleoprotein; myosin. Though corpuscular proteins, they have elongated particles before denaturation. Group B consists of those which show flow-anomaly only (in the first instance) in the surface film, and no flow-birefringence in the bulk phase. They are probably close to spherical in shape in solution, but form elongated particles as they denature in the surface film. After this process has been completed, they may show flow-anomaly also in the bulk phase. Some proteins show flow-anomaly in the surface film immediately it forms, others only show it after a certain time has elapsed for the building up of the film. We designate the former as group B1 and the latter as group B2. Group B1, immediate surface film flow-anomaly. Examples: serum euglobulin, amphibian embryo euglobulin b. Group B2, slowly appearing surface film flow-anomaly. After the film has once been fully formed and then dispersed by shaking, the solution may have the properties of that of a protein in group B1; i.e., anomalous flow in the film may occur immediately on testing in the viscosimeter. Examples: avian ovalbumin, amphibian embryo pseudoglobulin. Group C consists of those proteins which show flow-anomaly neither in the bulk phase nor in the surface film, under the conditions used by us. They are probably close to spherical in shape. Examples: insulin, methaemoglobin, amphibian embryo euglobulin c, mucoproteins. 3. The theoretical significance of protein fibre molecules, whether native or formed by denaturation in the living cell, is discussed, especially in relation to experimental morphology and cytology.

Anomalous viscosity behavior of polymer solutions at very low concentrations

1957 ◽  
Vol 26 (113) ◽  
pp. 213-226 ◽  
Author(s):  
Tōru Kawai ◽  
Kazuhisa Saito ◽  
W. R. Krigbaum
Keyword(s):  
Polymer Solutions ◽  
Anomalous Viscosity ◽  
Viscosity Behavior ◽  
Low Concentrations

Dispersion and Rheological Properties of Alumina Freeze Casting Slurries Containing Nanoparticle/Whisker SiC

2007 ◽  
Vol 280-283 ◽  
pp. 1035-1038 ◽  
Author(s):  
Tae Young Yang ◽  
Young Min Park ◽  
Gun Dae Lee ◽  
Seog Young Yoon ◽  
Ron Stevens ◽  
...  
Keyword(s):  
Shear Rate ◽  
Shear Viscosity ◽  
Pure Alumina ◽  
Rheological Measurements ◽  
Continuous Shear ◽  
Suspension Viscosity ◽  
Low Shear Viscosity ◽  
Opposite Manner ◽  
High Structure ◽  
Low Shear

The sedimentation density significantly decreased after addition of dispersant; the effect was more pronounced with pure alumina, as compared with SiC-containing slurry. With further addition of surfactant, the sedimentation density increased somewhat, but decreased with binderadditions. The suspension viscosity generally behaved in an opposite manner to the sedimentation density, i.e., low sedimentation density gave high low-shear viscosity, indicative of high structure formation in the suspended particles. Shear rate rheological measurements showed continuous shear thinning behavior.

scholarly journals Entangled chain polymer liquids under continuous shear deformation: consequences of a microscopically anharmonic confining tube

Soft Matter ◽  
2018 ◽  
Vol 14 (34) ◽  
pp. 7052-7063 ◽  
Author(s):  
Shi-Jie Xie ◽  
Kenneth S. Schweizer
Keyword(s):  
Shear Deformation ◽  
Chain Polymer ◽  
Rheological Response ◽  
Flexible Polymer ◽  
Continuous Shear ◽  
Polymer Liquids ◽  
Induced Changes

Deformation-induced changes of tube confinement field significantly modifies the shear rheological response of entangled flexible polymer liquids at WiR < 1.

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