Drift and oscillatory motion of a vertical cylinder on internal waves

The behavior of a floating body on surface waves receives much attention in ship hydrodynamics, while relatively few scientific investigations are devoted to the problem on the motion of an immersed body of neutral buoyancy under the action of internal waves in a fluid that is stably stratified in density. This problem has a number of specific features attributed to the fact that the restoring buoyancy force is relatively small under conditions that are important in practice. This problem is considered anew to supplement the available experimental information on the drift and oscillatory motion on internal waves. The theoretically and experimentally obtained information on the behavior of a vertical elongated body on internal waves is presented.