Hydrodynamic bearings are a type of bearing that support a load using a thin film of lubricant, typically oil. This lubricant creates a hydrodynamic effect, allowing the bearing surfaces to float apart, reducing friction and wear. They are commonly used in applications where high speeds and heavy loads are present, such as in turbines and electric motors. These bearings operate without direct contact between the moving parts, which helps to extend their lifespan and improve efficiency. The design of hydrodynamic bearings can vary, but they often include features like grooves or patterns to enhance the flow of lubricant.