Elephter Andronikashvili tested the two-fluid model of superfluidity by oscillating a stack of closely spaced disks in liquid helium-4. Viscous coupling makes the normal component follow the disks, adding to their effective moment of inertia; the superfluid component need not rotate with them. Measuring the oscillation period as temperature changes therefore estimates the normal-fluid fraction under the apparatus's entrainment conditions. The experiment turns an apparently unusual flow law into a mechanical measurement of two distinct contributions to one liquid.[ref]
A direct observation of the two kinds of motion in helium II by Elephter Andronikashvili. Journal of Physics 10, 201 (1946), two-component-motion experiment
Portrait of Elephter Andronikashvili
. Devi Garibashvili (დევი ღარიბაშვილი), attribution on Commons. CC BY-SA 4.0, via Wikimedia Commons. Source. Articles by others on the same topic
Elephter Andronikashvili is not a widely recognized figure or term in popular culture, science, or historical contexts as of my last update in October 2023. It's possible that it could refer to a specific person or idea that hasn't gained significant visibility, or it may be a name that is relevant in a niche area or a specific locale.