Stationary Solutal Marangoni Instability in a Two-Layer System.
The effect of different mass transfer mechanisms on the Marangoni instability in a two-layer system of finite width is studied. A dilute soluble surfactant is transferred across the interface between two immiscible fluid phases. A linear stability analysis is developed, and the corresponding eigenvalue problem is solved analytically for the onset of monotonic instability. Mass transfer is assumed to be controlled by bulk diffusion or/and by the adsorption-desorption mechanism. The influences of the diffusivity ratio and the layer width ratio on the instability of the system are examined. Copyright 1998 Academic Press.
Institute of Mechanics, Bulgarian Academy of Sciences, Acad. G. Bontchev St., Block 4, Sofia, 1113, Bulgaria
S
Slavtchev
M
Hennenberg
J
Legros
G
Lebon