Elastohydrodynamics

Elastohydrodynamics (EHD) describes the study of how lubricants behave when thin films separate two surfaces under high pressure, causing those surfaces to elastically deform. It combines principles of fluid dynamics and material elasticity to explain how lubricants prevent metal parts, like gears and bearings, from directly touching and wearing out. When surfaces press together strongly, the lubricant forms a thin, pressure-resistant film that deforms the surfaces slightly, ensuring smooth movement and reducing friction. EHD is essential for designing reliable machinery components that operate under heavy loads and high speeds, ensuring durability and efficient performance.