On the Stability of the Vertically Stratified State of a Vapor-Gas Mixture Between Two Parallel Condensed Phases

摘要

Behavior of a vapor-gas mixture between two parallel plane condensed phases under a constant gravity is investigated on the basis of the Hamel model equation. First, the problem is studied numerically by putting a spatially one-dimensional constraint. Then, by relaxing the constraint to a two-dimensional one, the stability of the one-dimensional vertically stratified states is investigated, again numerically. It is demonstrated that, for certain parameter settings, the stratified states are unstable and undergo a transition to another state with convection rolls. The range of parameter set of this transition is presented. The influence of temperature field on the observed transition is also discussed.