Feasibility of metal pad roll instability experiments at room temperature

We propose a solution to the longstanding problem of experimentally reproducing the metal pad roll instability at room temperature. Combining theoretical arguments with numerical simulations we show that the instability can occur in a centimeter scale set-up, with reasonable values of the magnetic field and electrical current and using either gallium with mercury (immiscible fluid pair) or gallium with GaInSn eutectic alloy (miscible fluid pair).