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A molecular dynamics simulation is used to investigate the effect of surface roughness on the nano-rheology of ultra-thin films confined between two solid walls. The results show that friction is sensitive to the confining surface morphology and the fluid molecules near the two confining surfaces are in a layering solid-like structure. At a high shear rate, the interfacial layers of the film stick...
A molecular dynamics simulation of confined n-alkanes has been conducted to investigate the effects of the chain length of lubricant molecule and normal load on friction and asperity contact. The density distribution and surface coverage of lubricant atoms were calculated. The simulation results indicate that longer chain n-alkanes can provide more atoms for the mono-layer in the asperity contact...
Lubricant is usually a mixture of polar and non-polar molecules, and tribo-metal surfaces can be oxidised and have surface atoms with charges. A molecular dynamics simulation of bcc iron with additional charge as rough tribo-surface and polarisable PEO polymer as lubricant was proposed to investigate the tribo-surface charge and polar molecules on friction and lubrication during the compression and...
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