Instabilities in a fluid layer with phase changes

Details Instabilities in a fluid layer with phase changes Instabilities in a fluid layer with phase changes

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007pepi..165..147r&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 165, Issue 3-4, p. 147-157.

Physics

Scientific paper

The onset of convection in a bottom heated horizontal fluid layer containing two different phases is investigated with emphasis on the effect of the location of the phase change interface. A general analysis, applicable when the phase boundary is at any location in the layer, is used to determine how both exothermic and endothermic phase changes influence layer instability. A perturbation analysis is presented for phase change boundaries close to the bottom of the fluid layer. Stability of the layer depends on three dimensionless parameters: R, a latent heat parameter; S, a phase boundary distortion parameter; and ξ, a phase boundary location parameter. Both exothermic and endothermic phase changes can be either stabilizing or destabilizing depending on S and R. Application is made to the exothermic olivine spinel (in Earth and Mars) and perovskite post-perovskite (in Earth) phase transitions and the endothermic spinel perovskite phase change (in Earth). The perturbation analysis provides a quantitative analytic criterion to predict whether a phase change near the lower boundary is stabilizing or destabilizing. When the exothermic phase change is stabilizing (destabilizing), the layer is most stable (unstable) when the phase change is in the middle.

Affiliated with

Also associated with

No associations

Rating

Instabilities in a fluid layer with phase changes 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 Instabilities in a fluid layer with phase changes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Instabilities in a fluid layer with phase changes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1025237