...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...

... 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...

... 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...

... 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...

...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...

...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...

... 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...

... 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...

... 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...

...@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...

...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...

...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...

.... 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...

...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...

... 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...

...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...

... 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...

... 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...

... 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...

...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...