Interfacial instability induced by lateral vapor pressure fluctuation in bounded thin liquid-vapor layers

Details Interfacial instability induced by lateral vapor pressure fluctuation in bounded thin liquid-vapor layers Interfacial instability induced by lateral vapor pressure fluctuation in bounded thin liquid-vapor layers

2008-12-19

arxiv.org/abs/0812.3806v2

Physics

Fluid Dynamics

38 pages, 5 figures; Changed content

Scientific paper

We study an instability of thin liquid-vapor layers bounded by rigid parallel walls from both below and above. In this system, the interfacial instability is induced by lateral vapor pressure fluctuation, which is in turn attributed to the effect of phase change: evaporation occurs at a hotter portion of the interface and condensation at a colder one. The high vapor pressure pushes the interface downward and the low one pulls it upward. A set of equations describing the temporal evolution of the interface of the liquid-vapor layers is derived. This model neglects the effect of mass loss or gain at the interface and guarantees the mass conservation of the liquid layer. The result of linear stability analysis of the model shows that the presence of the pressure dependence of the local saturation temperature mitigates the growth of long-wave disturbances. The thinner vapor layer enhances the vapor pressure effect. We find the stability criterion, which suggests that only slight temperature gradients are sufficient to overcome the gravitational effect for a water/vapor system. The same holds for the Rayleigh-Taylor unstable case, with a possibility that the vapor pressure effect may be weakened if the accommodation coefficient is below a certain critical value.

Affiliated with

Also associated with

No associations

Rating

Interfacial instability induced by lateral vapor pressure fluctuation in bounded thin liquid-vapor layers does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Interfacial instability induced by lateral vapor pressure fluctuation in bounded thin liquid-vapor layers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interfacial instability induced by lateral vapor pressure fluctuation in bounded thin liquid-vapor layers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-727118