Results 141 to 150 of about 1,846,052 (196)
The effects of humidity on thermoregulatory physiology of a small songbird.
J Exp BiolPorter CK +3 more
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Thermoregulatory consequences of growing up during a heatwave or a cold snap in Japanese quail.
J Exp BiolPersson E, Ó Cuív C, Nord A.
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The Navier–Stokes approach for thermal EHL line contact solutions
Tribology International, 2002 Abstract The complicated nature of the EHL-problem has so far forced researchers to develop their own computer codes. These codes are ultimately based on the Reynolds equation, and if thermal EHL-simulations are required, a simultaneous solution of the equation of energy also has to be performed.
T. Almqvist, R. Larsson
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Effect of coatings on thermal conditions of EHL
Lubrication Science, 1995AbstractThe thermal EHD model of rectangular contact has been applied to analysing the effect of coatings on thermal conditions in EHL. The model takes into account variation of oil viscosity along and across the oil film according to the Barus formula. The solution has been obtained by means of the Newton‐Raphson method.
exaly +2 more sources
Measurement of EHL temperature by thin film sensors – Thermal insulation effects
Tribology International, 2020Abstract The temperature of elastohydrodynamically lubricated (EHL) contacts strongly influences fluid friction. The higher the EHL temperature, the lower is the effective lubricant viscosity and hence shear stress. EHL contacts with Diamond-like Carbon (DLC) coatings have shown lower fluid friction than EHL contacts without DLC coatings.
Karsten Stahl +2 more
exaly +2 more sources
Effect of fluid rheology on the thermal EHL under ZEV in line contact
Tribology International, 2015In this study, thermal EHL performances in line contact under zero entrainment velocity (ZEV) are investigated theoretically by employing Newtonian and Ree–Eyring fluid models. From high to modest surface velocity, both rheology models predict large classical surface dimple and the depth of the surface dimple increases with decrease of the surface ...
Jing Wang, Binbin Zhang, Milan Omasta
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Scale and contact geometry effects on friction in thermal EHL: twin-disc versus ball-on-disc [PDF]
Tribology International, 2021 Plint (IMechE 182 (1):300–306,1967) reported a reduced coefficient of friction with increasing roller sizes in EHL traction measurements. In this study, a similar scale effect has been observed when comparing measured traction curves at the same ...
Gerhard Poll, H C Liu
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Journal of Tribology, 2009 This paper investigates the traction behavior in heavily loaded thermo-elastohydrodynamic lubrication (EHL) line contacts using the Doolittle free-volume equation, which closely represents the experimental viscosity-pressure-temperature relationship and ...
Punit Kumar, Michael M. Khonsari
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Influences of solid and lubricant thermal conductivity on traction in an EHL circular contact [PDF]
Tribology International, 2020 The influences of thermal conductivity of both the contacting solids and the lubricant on the traction in a rolling/sliding EHL contact have been studied numerically.
Gerhard Poll, H C Liu
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Speeding up the solution of thermal EHL problems
International Journal for Numerical Methods in Engineering, 2002AbstractThis paper considers the fast solution of large, dense linear systems arising from thermal EHL problems.We present an efficient preconditioner for these, based on a novel combination of wavelet compression with the Schur complement. Numerical results illustrate the effectiveness of this approach. Copyright © 2002 John Wiley & Sons, Ltd.
Ford, Judith M., Chen, Ke
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