Results 11 to 20 of about 302,026 (291)

Study on Relations of High-Pressure Viscosity Properties and the Polymer Behavior of Various Viscosity Index Improver-Blended Oil (Part 2)

open access: yesTribology Online, 2021
Using high-pressure viscosity measurements of 23 kinds of VII-blended oil reported in Part 1, a high-pressure viscosity prediction formula for VII-blended oil was derived.
Hitoshi Hata, Yoshitaka Tamoto
doaj   +1 more source

Influence of Some Additives on the Efficiency of Viscosity Index Improver for Base Lubricating Oils

open access: yesJournal of Engineering, 2023
The effects of three different additives formulations namely Lubrizol 21001, HiTEC 8722B and HiTEC 340 on the efficiency of VII namely OCP of three base lubricating oils namely 40 stock and 60 stock and 150 stock at four temperatures 40, 60, 80 and ...
Talib Bahjat Kashmoula   +1 more
doaj   +1 more source

Valorization of Cynara Cardunculus L. Oil as the Basis of a Biorefinery for Biodiesel and Biolubricant Production

open access: yesEnergies, 2020
The production of sustainable and biodegradable products, for energy or material use, is becoming important for local economies. Thus, biorefineries can play an important role in sustainable development at regional levels and therefore the search for ...
Sergio Nogales-Delgado   +2 more
doaj   +1 more source

Extension of the dielectric breakdown model for simulation of viscous fingering at finite viscosity ratios [PDF]

open access: yes, 2014
Immiscible displacement of viscous oil by water in a petroleum reservoir is often hydrodynamically unstable. Due to similarities between the physics of dielectric breakdown and immiscible flow in porous media, we extend the existing dielectric breakdown ...
Doorwar, Shashvat, Mohanty, Kishore K.
core   +1 more source

Thermophysical properties of a Cu46Zr42Al7Y5 bulk metallic glass-forming liquid [PDF]

open access: yes, 2006
The thermophysical properties, including the specific volume V, the surface tension sigma, and the viscosity eta, of a Cu46Zr42Al7Y5 bulk metallic glass in the molten state were investigated using a containerless high-temperature high-vacuum ...
Choo, H.   +6 more
core   +1 more source

Prediction of thickening efficiency of olefin copolymers and kinematic viscosities of the blended base oils by determining intrinsic viscosities of the copolymers in cyclohexane

open access: yesEgyptian Journal of Petroleum, 2022
The engine oil contains various performance additives along with polymer-based viscosity index improver, which are made from special types of flexible long chain polymers whose functionality is derived from their thickening efficiency, viscosity ...
M.S. Negi   +4 more
doaj   +1 more source

Comment on the power law in rheological equations [PDF]

open access: yes, 2008
In conformity with the principle of shear reversal, it is proposed that the power law index in the Cross equation relating steady state viscosity to shear rate in semisolid alloy slurries should have a value of 4/3, which is independent of alloy system ...
Barnes   +11 more
core   +1 more source

"Research summary on hydrogenated styrene-diene copolymer viscosity index improver"

open access: yesHecheng xiangjiao gongye, 2023
The development history, market overview and development status of viscosity index improver for hydrogenated styrene-diene copolymer at home and abroad were systematically summarized with 38 references, and the basic classification, performance ...
LI Wei-tian, WANG Qin-fang, ZHANG Wang, DONG Jing, ZHANG Hua-qiang
doaj   +1 more source

A Viscosity Method for the Min-Max Construction of Closed Geodesics [PDF]

open access: yes, 2015
We present a viscosity approach to the min-max construction of closed geodesics on compact Riemannian manifolds of arbitrary dimension. We also construct counter-examples in dimension $1$ and $2$ to the $\varepsilon$-regularity in the convergence ...
Michelat, Alexis, Rivière, Tristan
core   +2 more sources

Probing equilibrium glass flow up to exapoise viscosities [PDF]

open access: yes, 2015
Glasses are out-of-equilibrium systems aging under the crystallization threat. During ordinary glass formation, the atomic diffusion slows down rendering its experimental investigation impractically long, to the extent that a timescale divergence is ...
Cerullo, G.   +5 more
core   +2 more sources

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