Convective motions in a fluid layer are affected by its orientation with respect to the gravitational field. We investigate the long-term stability of a thermally stressed layer of a binary liquid mixture and show that pattern formation is strongly affected by marginal inclinations as small as a few milliradians. At small Rayleigh numbers, the mass transfer is dominated by the induced large scale shear flow, while at larger Rayleigh numbers, it is dominated by solutal convection. At the transition, the balance between the solutal and shear flows gives rise to drifting columnar flows moving in opposite directions along parallel lanes in a superhighway configuration.
|Titolo:||Effect of a marginal inclination on pattern formation in a binary liquid mixture under thermal stress|
VAILATI, ALBERTO (Ultimo)
|Parole Chiave:||convection ; pattern formation ; Soret effect ; solutal convection ; large scale flow ; thermohaline circulation ; collective motions ; self organization|
|Settore Scientifico Disciplinare:||Settore FIS/03 - Fisica della Materia|
|Data di pubblicazione:||5-lug-2013|
|Digital Object Identifier (DOI):||10.1103/PhysRevLett.111.014502|
|Appare nelle tipologie:||01 - Articolo su periodico|