Thermal-noise effect on the transition to Rayleigh-Bénard convection.
We report measurements of fluctuation and roll patterns near the transition to Rayleigh-Bénard convection which are consistent with a fluctuation-induced first-order transition, as predicted by Swift and Hohenberg. Above onset, we find convection rolls with noise-induced fluctuations, time-dependent amplitude modulation and roll undulation, and homogeneous dislocation nucleation.
Oh
Jaechul
J
Department of Physics and iQUEST, University of California, Santa Barbara, CA 93106, USA.
Ahlers
Guenter
G