Results 101 to 110 of about 2,264,111 (240)

Convergence to the Reynolds approximation with a double effect of roughness [PDF]

, 2010
We prove that the lubrication approximation is perturbed by a non-regular roughness of the boundary. We show how the flow may be accelerated using adequate rugosity profiles on the bottom.
Choquet, Catherine, Chupin, Laurent, Gisclon, Marguerite   +2 more
core   +3 more sources

Improved boundary lubrication with formulated C-ethers [PDF]

A comparison of five recently developed C-ether-formulated fluids with an advanced formulated MIL-L-27502 candidate ester is described. Steady state wear and friction measurements were made with a sliding pin on disk friction apparatus.
Loomis, W. R.
core   +1 more source

Free surface flows with large slopes: beyond lubrication theory

, 2006
The description of free surface flows can often be simplified to thin film (or lubrication) equations, when the slopes of the liquid-gas interface are small.
Hocking L. M., Jacco H. Snoeijer, Kistler S. F.   +2 more
core   +1 more source

Tribofilm Formation and Friction Reduction Performance on Laser-Textured Surface with Micro-Grooved Structures

Lubricants
Tribofilms, resulting from tribochemical reactions involving lubricants, additives, and metal surfaces, are pivotal in reducing friction, preventing adhesion, and minimizing wear.
Qianru Li, Renguo Lu, Hiroshi Tani, Shohei Kawada, Shinji Koganezawa, Xujun Liu, Peihong Cong   +6 more
doaj   +1 more source

Lubrication Modeling of the Reciprocating Piston with High Lateral Load and Various Conditions in a Swash Plate-Type Piston Pump

Lubricants
Most asymmetrical lateral forces occur in the reciprocating piston mechanism, which is widely applied as a major component of power equipment. When this lateral force greatly acts on the piston, it comes into contact with the cylinder.
Sung-Ho Hong, Jung-Hun Shin
doaj   +1 more source

Considerations on the lubrication of spacecraft mechanisms [PDF]

, 1983
Space tribology and a number of precepts to guide designers in its application are discussed. Of the many techniques available all, without exception, have limitations in performance.
Briscoe, M., Todd, M. J.
core   +1 more source

Nature’s lubrication solutions

Friction
We briefly review the organizing principles that nature has selected to reduce friction between sliding tissues in the body to maintain their well-being.
Jacob Klein
doaj   +1 more source

A method for simultaneously measuring friction and gap at metal–lubricant interface by combined use of atomic force microscopy and line-and-space patterned metal films

Frontiers in Mechanical Engineering
In boundary lubrication, adsorbed molecular films formed by lubricant additives on the metal surfaces of sliding parts effectively reduce friction and wear.
Naoki Yamashita, Tomoko Hirayama
doaj   +1 more source

Evaluation of boundary lubricants using steady-state wear and friction [PDF]

A friction and wear study was made at 20 C to establish operating limits and procedures for obtaining improved reproducibility and reliability in boundary lubrication testing. Ester base and C-other base fluids were used to lubricate a pure iron rider in
Jones, W. R., Jr., Loomis, W. R.
core   +1 more source

Effect of surfactant self-assembly on lubrication performance in oil-based systems: the role of reverse micelles and vesicles

Frontiers in Mechanical Engineering
Surfactants are effective additives for oil-based lubricants, capable of reducing friction under boundary lubrication conditions through their self-assembly into nanostructures.
Haiyang Gu, Tomoko Hirayama
doaj   +1 more source