Vibration overcomes gravity on a levitating fluid

Gravity & Hydrodynamics: Lectures on the fluid-gravity correspondence

We discuss recent developments in the hydrodynamic description of strongly coupled conformal field theories using the AdS/CFT correspondence. In particular, we review aspects of the fluid-gravity correspondence which provides a map between a class of inhomogeneous, dynamical, black hole solutions in asymptotically AdS spacetimes and arbitrary fluid flows in the strongly interacting boundary fie...

Two-fluid Viscous Modified Gravity on a Rs Brane

Singularities in the dark energy late universe are discussed, under the assumption that the Lagrangian contains the Einstein term R plus a modified gravity term R, where α is a constant. The 4D fluid is taken to be viscous and composed of two components, one Einstein component where the bulk viscosity is proportional to the scalar expansion θ, and another modified component where the bulk visco...

Diamagnetic Levitating Rotor

This paper analyzes some basic design aspects for a three phase diamagnetic levitating rotor. A proposed design uses a triangular configuration of magnets for a levitating rotor. A formula for finding a the approximate levitation point of the rotor is given. The proposed system uses three phase alternating current and a nine coil configuration to drive the levitating rotor. For this configurati...

PHYSICAL MATHEMATICS SEMINAR Surface Waves on Levitating Liquid

When a pool of water is deposited on a surface hotter than 200◦ C, it breaks into small drops that roll over the substrate with very little friction. The evaporation process of these drops lasts for a much longer time than expected the presence of a thin vapour layer supports the liquid weight by lubrication force, and the evaporation is drastically limited by the poor thermal conductivity of t...

Nonlinear Fluid Dynamics From Gravity