👉 Touched fluid, also known as hydrodynamic lubrication fluid, is a specialized lubricant designed to minimize friction and wear between moving surfaces in contact. In this system, the fluid is introduced into the gap between two surfaces, typically in a controlled manner, creating a thin film that separates them. This film prevents direct metal-to-metal contact, reducing friction and heat generation while also carrying away contaminants. The fluid's viscosity and flow properties are crucial, as they determine the effectiveness of this lubrication in maintaining smooth operation under various loads and speeds. This type of lubrication is commonly used in machinery, such as bearings and gears, to enhance efficiency and prolong the lifespan of components.