Archimedes’ principle is a law of buoyancy that states that an object entering a fluid rises equal to the weight of the fluid that pushed it away. However, a paper was published showing that a yacht with abnormal buoyancy, which violates these laws, can cause the phenomenon to float upside down, attracting attention.
Even if water is slowly poured into the oil in the tank, the balance is lost due to the small difference, and water, which is denser than oil, sinks under the oil. However, if certain conditions are met, a liquid layer can be floated on a layer of a low density material such as air.
According to the research team, through a study further developed from the results of past research that it is possible to float a liquid that gives vertical vibration, an experiment was conducted to give vibration to silicone oil and glycerin, which have a higher viscosity than water.
In the video, the liquid is floating in the air layer above the liquid. Like an hourglass, the liquid falls from top to bottom according to gravity when the viscous liquid is placed in the tank and tilted. Normally, the liquid is attracted by gravity, but this time, the tank was turned over, giving the proper vibration, so that it continued normally without dropping some. This is because the vibration prevented the formation of water droplets. This phenomenon itself was discovered in the past, but when the research team placed a plastic boat in a tank, the boat floated upside down by attaching the bottom of the boat to a layer of liquid in the air using a magnet installed on the boat.
Through this study, it can be seen that the lower part of the liquid layer in the air has reversed the common sense that objects rise upward. This discovery is not limited to a simple phenomena, it is evaluated that it may be applicable to transporting gases or objects trapped in a fluid. Related information can be found here .