Loss of friction refers to the phenomenon that a fluid loses part of its pressure through a pipe, hose, or other limited space. For example, the mechanical system of an internal combustion engine, or centrifugal pump piping system, which means that the power supply is lost to overcome the friction between the two moving surfaces. Widely used in the transportation of liquids.
There are several reasons for friction losses, including:
1. Friction loss depends on the conditions of the flow and the physical properties of the system, chemical properties.
2. Fluid movement molecules are mutually.
3. Movement of fluid molecules on pipes or similar inner surfaces, especially if the inner surface is rough and textured, otherwise it is not smooth.
4. Bend, kink, and hose or pipe in other sharp turns.
5. There are two kinds of losses caused by tube flow friction: skin friction and friction. The former is due to the pipe material in contact with the fluid, the roughness in the pipe, and the latter is due to the flow line of the obstacle. (A bend, control valve, or any movement that changes the flow of fluid.)
