Effects of Isotropic Pressure on the High Temperature High Shear Viscosity of Motor Oils

1983 ◽  
Author(s):  
John F Hutton ◽  
Bernard Jones ◽  
Terence W. Bates
Keyword(s):  
High Temperature ◽  
Shear Viscosity ◽  
High Shear ◽  
Isotropic Pressure ◽  
Motor Oils

scholarly journals Measurement techniques for steady shear viscosity of Mozzarella-type cheeses at high shear rates and high temperature

2015 ◽  
Vol 47 ◽  
pp. 102-108 ◽  
Author(s):  
Prateek Sharma ◽  
Tzvetelin T. Dessev ◽  
Peter A. Munro ◽  
Peter G. Wiles ◽  
Graeme Gillies ◽  
...  
Keyword(s):  
High Temperature ◽  
Shear Viscosity ◽  
Measurement Techniques ◽  
Steady Shear ◽  
High Shear ◽  
Shear Rates ◽  
Steady Shear Viscosity ◽  
High Shear Rates

Evaluation of high-temperature dispersancy of motor oils

1976 ◽  
Vol 12 (3) ◽  
pp. 244-246
Author(s):  
E. V. Glavati ◽  
I. L. Rabinovich ◽  
O. L. Glavati ◽  
A. P. Chermenin
Keyword(s):  
High Temperature ◽  
Motor Oils

Rheological Characteristics of Viscoelastic Surfactant Fluid Mixed With Silica Nanoparticles

2013 ◽  
Author(s):  
Yueqiong Wu ◽  
Zhongyang Luo ◽  
Hong Yin ◽  
Tao Wang
Keyword(s):  
High Temperature ◽  
Shear Rate ◽  
Volume Fraction ◽  
Sio2 Nanoparticles ◽  
Fluid Loss ◽  
Rheological Characteristics ◽  
High Shear ◽  
Fracturing Process ◽  
Viscoelastic Surfactant ◽  
Rheological Performance

Since the surfactant can form rod-like micelles or even cross-link structures, viscoelastic surfactant (VES) fluid has unique rheological characteristics. The demerits of VES fluids have been proven after being applied as the fracturing fluid for several years. However, the fluid has high fluid loss and a low viscosity at high temperature, which limits the application to hydraulic fracturing. This paper focuses on the VES fluid mixed with nanoparticles which should be an effective way to maintain the viscosity at high temperature and high shear rate. The experiments were based on preparation of uniform and stable nanocolloids, which utilize Microfluidizer high shear fluid processor. Dynamic light scattering and microscopic methods are employed to investigate the stability and micro-structure of the VES fluid. The effects of temperature, shear rate and volume fraction of the nanoparticles on rheology of VES were studied. The SiO2 nanoparticles could significantly improve the rheological performance of VES fluid, although the rheological performance at the temperature over 90 °C needs to be enhanced. The mechanisms of interactions between nanoparticles and micelles are also discussed later in the paper. At the end, the potential of VES fluid mixed with nanoparticles during application in fracturing process was discussed.

scholarly journals Assessment Mixing and Compaction Temperatures for Modified HMA Using Superpave High Shear Viscosity Methods

2018 ◽  
Vol 21 (4) ◽  
pp. 516-522 ◽  
Author(s):  
Alaa Hussein Abed ◽  
Ali Hwaidi Nasser
Keyword(s):  
Shear Viscosity ◽  
Asphalt Mixture ◽  
High Shear ◽  
Compaction Temperature ◽  
Modified Asphalt ◽  
Performance Grade ◽  
Modified Binders ◽  
Different Temperatures ◽  
Marshall Stability

The objective of this study is determining the mixing and compaction temperature of the modified asphalt mixture. Results of binder tests showed that the addition of 3% SBS  to control asphalt (PG 64-16) would achieve the desired performance level (PG 76-16) a performance grade that fits our climate with traffic loads. When using 5% SBS the performance grade of binder increased three grades (PG 82-16) and when increasing SBS content to 8% the performance grade increased four grades (PG 88-16). At shear rate of 500 (s-1), the modified asphalt viscosity can be obtained at different temperatures and the viscosity temperature curve can be achieved. As a result, the mixing and compaction temperature of modified asphalt can be determined to reach 0.17 ± 0.02 Pa.s and 0.28 ± 0.03 Pa.s for mixing and compaction, respectively. It is noted that SBS modified reached a viscosity of 3 Pa.s when 8 % additive. Additive contents above these values may not be suitable for good workability and pump ability according to Superpave specifications. While addition of 5% SBS with control asphalt, more than 3.7times at 135°C Increase the viscosity. Marshall Stability test indicated that the strength for the SBS specimens increases as compared to the conventional specimens. An increase of about 39%, 74%, 102%, was observed with 3%SBS 5%SBS 8%SBS modified binders, respectively. The Marshall test results for 8%SBS binders required compaction temperatures above 175°C need to keep up quality of HMA item while limiting natural effect amid development, these proposals are unsatisfactory Modified mixtures the 5% SBS modification was determined to be the maximum useful content. The Superpave method to estimate mixing and compaction temperatures show are not practical for use with modified binders. Also,  it is observed that good agreement values between the average Marshall compaction temperature and the High Shear Viscosity Method (HSRV) and   lower than Superpave methods Where the decline ranges from 15 ºC to 17 ºC.

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