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Keywords: viscosity
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Journal Articles
Article Type: Research Papers
J. Tribol. November 2021, 143(11): 111805.
Paper No: TRIB-21-1086
Published Online: June 18, 2021
... oil ring (rad) ν = oil viscosity (m 2 /s) ρ = oil density (kg/m 3 ) ω = rotational speed of a given rotating element (rpm) The authors would like to express their gratitude to the CIRTrans (Consortium Industrie Recherche sur les TRANSmissions mécaniques) for its...
Journal Articles
Article Type: Research Papers
J. Tribol. December 2021, 143(12): 121806.
Paper No: TRIB-21-1059
Published Online: May 18, 2021
... γ ˙ = shear rate ɛ = emissivity η = apparent viscosity ρ = density τ = shear stress τ yd = yield stress ɸ = volume fraction ψ = sphericity ɷ = the rotational speed of the disc The datasets generated and supporting...
Journal Articles
Article Type: Research Papers
J. Tribol. May 2021, 143(5): 051103.
Paper No: TRIB-20-1540
Published Online: February 26, 2021
... pattern skin friction coefficient Reynolds number wind channel experiment additive manufacturing bionic engineering friction surface properties and characterization surface roughness and asperities surface treatments viscosity Dragonflies are known as one of the most efficient insects...
Journal Articles
Article Type: Research Papers
J. Tribol. September 2021, 143(9): 091801.
Paper No: TRIB-20-1377
Published Online: December 22, 2020
...@iitp.ac.in Contributed by the Tribology Division of ASME for publication in the J ournal of T ribology . 17 08 2020 12 11 2020 12 11 2020 22 12 2020 clutches fluid friction rheology surfaces tribological systems viscosity A magnetorheological (MR) clutch...
Journal Articles
Article Type: Research Papers
J. Tribol. June 2021, 143(6): 061901.
Paper No: TRIB-20-1312
Published Online: October 27, 2020
...Thomas J. Zolper; Scott Bair; Kyle Horne The ASME Pressure-Viscosity Report was a seminal publication on high pressure-viscosity and density supervised by the ASME Research Committee on Lubrication, sponsored by dozens of industries, and undertaken by Harvard University using high-pressure...
Journal Articles
Article Type: Research Papers
J. Tribol. March 2021, 143(3): 031803.
Paper No: TRIB-19-1508
Published Online: September 21, 2020
...Dongil Shin; Jongin Yang; Xiaomeng Tong; Junho Suh; Alan Palazzolo Traditional analysis of journal bearings assumed a constant viscosity which simplified the solutions for static and dynamic characteristics and responses. Today's high-performance machinery requires more accurate models wherein...
Journal Articles
Article Type: Technical Briefs
J. Tribol. March 2020, 142(3): 034501.
Paper No: TRIB-19-1217
Published Online: November 19, 2019
.... Contributed by the Tribology Division of ASME for publication in the J ournal of T ribology . 21 05 2019 09 09 2019 09 09 2019 10 10 2019 grease lubrication lubricants rheology viscosity Greases play an important role in lubrication applications, as they separate...
Journal Articles
Article Type: Research-Article
J. Tribol. February 2019, 141(2): 021802.
Paper No: TRIB-18-1154
Published Online: October 11, 2018
...Scott Bair; Samuel Flores-Torres Understanding the pressure and shear dependence of viscosity is essential to an understanding of the mechanisms of film forming and friction in concentrated contacts. The blending of different molecular mass polyalphaolefins (PAOs) may permit the formulator...
Journal Articles
Article Type: Research-Article
J. Tribol. November 2018, 140(6): 061801.
Paper No: TRIB-17-1439
Published Online: May 28, 2018
... of polyvinylpyrrolidone caused the improvement in dynamic viscosity at lower shear rates and a significant change of viscosity in low temperatures. An increased value of the yield point of the tested lubricating compositions after introduction of the additive was also observed. The measure for antiscuffing properties...
Journal Articles
Article Type: Technical Briefs
J. Tribol. May 2018, 140(3): 034501.
Paper No: TRIB-17-1253
Published Online: January 16, 2018
...Peter Christiansen; Niels Schmidt Hansen; Martin Thomas Overdahl Lund; Jon Spangenberg; Niels Bay This paper describes the construction and testing of a simple, experimental tool setup that enables determination of the pressure–viscosity relationship for high viscosity oils. Comparing...
Journal Articles
Article Type: Research-Article
J. Tribol. May 2018, 140(3): 031701.
Paper No: TRIB-17-1120
Published Online: October 23, 2017
... condition. The traditional opinion that effective viscosity decreases with increasing temperature cannot completely explain this phenomenon. In this study, the air entrainment effect is introduced and evaluated using computational fluid dynamics (CFD). CFD results considering air entrainment, viscous...
Journal Articles
Article Type: Research-Article
J. Tribol. March 2018, 140(2): 021701.
Paper No: TRIB-16-1300
Published Online: September 29, 2017
... responses and their solution manifolds are obtainable and stretch out with selections of pad preload, pivot offset, and lubricant viscosity so that the periodic doubling bifurcations, saddle node bifurcations, and corresponding local stability are reliably determined by searching parameter sets. In case...
Journal Articles
Article Type: Research-Article
J. Tribol. January 2018, 140(1): 011403.
Paper No: TRIB-17-1042
Published Online: August 2, 2017
... February 1, 2017; final manuscript received April 27, 2017; published online August 2, 2017. Assoc. Editor: James R. Barber. 01 02 2017 27 04 2017 Friction Interface Sliding Surface roughness Viscosity Asperities After the introduction of the concepts of multiscale...
Journal Articles
Article Type: Research-Article
J. Tribol. November 2017, 139(6): 061607.
Paper No: TRIB-16-1400
Published Online: July 10, 2017
...Wei Dai; Kyungjun Lee; Alexander M. Sinyukov; Hong Liang In this research, rheological and tribological performance of additive V 2 O 5 nanoparticles in a light mineral oil has been investigated. For rheological performance, the addition of 0.2 wt. % V 2 O 5 could reduce the viscosity of the base...
Journal Articles
Article Type: Research-Article
J. Tribol. November 2017, 139(6): 061701.
Paper No: TRIB-16-1226
Published Online: July 10, 2017
... Lubricants Rheology Surface treatments Viscosity Research in the area of bearing lubrication has improved the static and dynamic performance of journal bearings over the last several decades. Different designs/architectures of hydrodynamic journal bearings, such as multilobe bore and tilting pad...
Journal Articles
Article Type: Research-Article
J. Tribol. November 2017, 139(6): 061501.
Paper No: TRIB-16-1303
Published Online: June 7, 2017
... between the reduction in viscosity of the oil and the reduction of refrigerant concentration with increased temperature. For high inlet pressure, the dilution effect is dominant, whereas for low inlet pressure, the temperature dependence of the viscosity of the solution dominates over the range of inlet...
Journal Articles
Article Type: Research-Article
J. Tribol. July 2017, 139(4): 041702.
Paper No: TRIB-16-1238
Published Online: April 4, 2017
..., lubricant flow, and eccentricity can be obtained with which other design and operational parameters can be determined. The dimensionless characteristics on these graphs permit its use to design bearings of similar geometry, with different diameters, lengths, radial clearances, angular speeds, viscosities...
Journal Articles
Article Type: Research-Article
J. Tribol. January 2017, 139(1): 011707.
Paper No: TRIB-16-1044
Published Online: August 16, 2016
... lubrication Viscosity Hybrid journal bearings operate under different physical and lubrication conditions. The behavior of a bearing can be predicted by changing different aspects like misalignment, elasticity, roughness, restrictor types, pocket sizes, restrictor design parameter, and lubricant...
Journal Articles
Article Type: Research-Article
J. Tribol. March 2017, 139(2): 021504.
Paper No: TRIB-16-1030
Published Online: August 11, 2016
... between their additive content and tribological performance. Gel permeation chromatography (GPC) and nuclear magnetic resonance (NMR) spectroscopy were used to characterize the molecular masses and structures, respectively. Density, viscosity, EHD film thickness, and friction were measured at 303 K, 348 K...
Journal Articles
Article Type: Research-Article
J. Tribol. January 2017, 139(1): 011801.
Paper No: TRIB-15-1363
Published Online: July 26, 2016
...Scott Bair; Tsuyoshi Yamaguchi Measurements are reported for dipentaerythritol hexaisononanoate (DiPEiC9) of pressure–volume–temperature (pVT) response to pressures to 400 MPa and temperatures to 100 °C, and of viscosity at pressures to 700 MPa and temperatures to 90 °C and shear stress to 18 MPa...