Convection in Binary Mixtures
Experimental results are presented for convection in shallow layers of binary mixtures heated from below. We used both ethanol-water mixtures at room temperature[1,2] and 3He-4He mixtures at 2.2 K.[3,4] The primary difference between the two cases is the value of the Prandtl number σ, which is about 18 in the room-temperature system and about 0.6 in the cryogenic case. Both were studied in long, narrow containers in which convection rolls are expected to be parallel to the short sidewalls.
KeywordsNusselt Number Binary Mixture Prandtl Number Rayleigh Number Convection Roll
- 2.G. Ahlers, D.S. Cannell, and R. Heinrichs, in Proc. International Conference on the Physics of Chaos and Systems far from Equilibrium, edited by M. Duong-van and B. Nichols, to be published.Google Scholar
- 4.T.S. Sullivan and G. Ahlers, Bull. Am. Phys. Soc., in print, and to be published.Google Scholar