Cavitation of a Liquid Column when Its Lower Boundary Moves
The paper considers the movement of a fluid column caused by a piston that travels along the vertical pipe in contact with its lower boundary. The law is formulated for the piston displacement judging from experimental data. The acceleration of the piston exceeds the acceleration due to gravity. Flow separation from the piston and a change in the volume of cavitation voids are assumed to occur. The simplest model is put forward for the phenomenon. The paper presents a qualitative analytical solution to the one-dimensional problem, numerical simulation and comparison with the experimental evidence.