Anomalous Phenomena in Fluid under the Action of Vibration

An anomalous behavior of the fluid under the action of vibration, which evolves to states corresponding to the maximum values of the potential energy was studied. The glass cylindrical vessel used in the experiments was fixed on the test bench. The vessel was filled with water up to a level of H = 180 mm and executed vertical harmonic vibrations with an amplitude of A =6.5 mm. Variations of the system behavior in the case of a slow frequency increase were observed under conditions of stroboscopic and usual illumination. At a frequency of ω = ω3 =δ, close to ω2, the system passed through a resonance corresponding to the free-oscillation frequency of the water column standing on the air pillow. Vibrational force can be interpreted as the radiation pressure produced by the rapid component of the particle motion. The results show the saturation of fluid by air bubbles under the action of vibration and a significant decrease in the sonic velocity in this medium.