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Keywords: viscosity
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Journal Articles
Article Type: Review Articles
J. Tribol. May 2023, 145(5): 050801.
Paper No: TRIB-22-1268
Published Online: January 19, 2023
...Anupam Bhandari The viscosity of ferrofluid has a vital role in liquid sealing of the hard disk drives, biomedical applications as drug delivery, hyperthermia, and magnetic resonance imaging. The theoretical expressions for ferrofluid viscosity and its limitation are presented in detail...
Journal Articles
Article Type: Research Papers
J. Tribol. May 2023, 145(5): 054401.
Paper No: TRIB-22-1292
Published Online: January 5, 2023
... T and (b) B = 0.6 T Fig. 2 MRG5 rotational rheology at varying magnetic field strengths: ( a ) shear stress as a function of shear rate and ( b ) apparent viscosity as a function of shear rate MRG5 rotational rheology at varying magnetic field strengths: (a) shear stress as a function...
Journal Articles
Accepted Manuscript
Article Type: Research Papers
J. Tribol.
Paper No: TRIB-21-1498
Published Online: January 5, 2023
.../hydrodynamic floating ring bearing theoretically and experimentally. The finite element method is coupled with the finite difference method to solve the variable-viscosity Reynolds equations, thermal energy equations, and the corresponding boundary conditions for the inner and outer films in a floating ring...
Journal Articles
Article Type: Research Papers
J. Tribol. March 2023, 145(3): 031702.
Paper No: TRIB-22-1269
Published Online: November 11, 2022
... ribology . 25 07 2022 09 10 2022 12 10 2022 11 11 2022 multiwall carbon nanotubes fumed silica MR fluids yield stress MR disc brake torque behavior brakes contact area fluid friction viscosity Science and Engineering Research Board 10.13039/501100001843...
Journal Articles
Article Type: Research Papers
J. Tribol. February 2023, 145(2): 021603.
Paper No: TRIB-22-1143
Published Online: November 4, 2022
... thermoelastohydrodynamic lubrication viscosity There is a growing need for further improvements to the efficiency of internal combustion engines due to their impact on environmental and sustainability problems [ 1 ]. In internal combustion engines for automobiles, mechanical energy loss accounts for 10–20...
Journal Articles
Article Type: Research Papers
J. Tribol. January 2023, 145(1): 012201.
Paper No: TRIB-21-1578
Published Online: October 7, 2022
...Wei Wang; Wenhan Zhao; Qiang Ma; Ange Nsilani Kouediatouka; Hui Zhang; Guangneng Dong; Meng Hua; Hon-Yuen Tam The synergistic effect of surface texturing and lubricants with various viscosity and polarity properties is an attractive and unexplored topic. In this study, surface texturing...
Journal Articles
Article Type: Research Papers
J. Tribol. January 2023, 145(1): 011601.
Paper No: TRIB-22-1060
Published Online: September 30, 2022
...Robert J. Sadinski; Carl H. Hager, Jr.; William M. Hannon The relative volume and falling body viscosity of a common high-pressure rheology reference lubricant, di-(2-ethylhexyl) sebacate (DEHS), are presented. Relative volume measurements up to 300 MPa are completed with a piezo-bellows relative...
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...