Experimental study of convection in the compressible regime

Publication by LGL-TPE in Phys. Rev. Fluids on March 25, 2019. Abstract: An experiment of thermal convection with significant compressible effects is presented. The high-gravity environment of a centrifuge and the choice of xenon gas enable us to observe an average adiabatic temperature gradient up to 3.5Kcm-1 over a 4 cm high cavity. At the highest rotation rate investigated, 9990 rpm, the superadiabatic temperature difference applied to the gas layer is less than the adiabatic temperature difference. The convective regime is characterized by a large Rayleigh number, about 1012, and dominant Coriolis forces (Ekman number of order 10-6).
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