Bio-inspired lubrication has gained great interest among researchers due to the fact that there are several examples in nature where biomolecules can enhance lubrication and provide low friction and low wear properties. VTT is currently running two projects on bio-based lubrication (“New Bioinspired and Bio-based Solutions for Lubrication (NEWLUB)” and “Biomimetic Water Lubrication” (BIOWAL)) t...

in order to develop more efficient engines, it is essential to optimize the lubrication circuit of the power train systems. in this paper, during an engine design and development process, a network analysis of the engine lubrication system is described in detail. two elements have been added to the lubrication circuit in the modified engine. these elements are hydraulic lifters and an anti-drai...

This review article summarizes recent progress in investigation of nano-rheology and thin film lubrication, as well as their contributions to conventional tribology. As the thickness of a lubricating film becomes comparable to molecular dimensions, a lubricant confined between solid walls undergoes a dramatic transition in its rheological properties and physical state, including the formation o...

Relative motion between soft wet solids arises in a number of applications in natural and artificial settings, and invariably couples elastic deformation fluid flow. We explore this in a minimal setting by considering a fluid-immersed negatively buoyant cylinder moving along a soft inclined wall. Our experiments show that there is an emergent robust steady-state sliding regime of the cylinder w...

Elastohydrodynamic lubrication (EHL) modelling plays an important role in engineering design and analysis since a number of important mechanical components operate under EHL conditions. In this paper methods are presented for solving both line and point contact cases using multiphysics software. The advantages, and the overheads, of using such an approach over developing highly specialised, bes...

Articular cartilage is an example of a highly efficacious water-based, natural lubrication system that is optimized to provide low friction and wear protection at both low and high loads and sliding velocities. One of the secrets of cartilage's superior tribology comes from a unique, multimodal lubrication strategy consisting of both a fluid pressurization mediated lubrication mechanism and a b...

Lubrication is one of the most important ways to reduce effect friction, which single largest cause for energy losses in society. Typically, friction reduction done by lubrication with petroleum-based oils, while technology focus shifting toward environmentally-friendly green lubrication. Lowest coefficients water-based have previously been achieved smooth surfaces such as silicon carbide and n...

The lubrication regime of articulating surfaces plays an important role for the understanding of the tribological conditions and the resulting wear performance of total disc replacement (TDR) of the spine. In the present study the lubrication regime for lumbar TDRs with ball and socket design have been assessed by applying the Hamrock-Dawson elasto-hydrodynamic lubrication theory. The effect of...