Hard turbulent thermal convection and thermal evolution of the mantle

Details Hard turbulent thermal convection and thermal evolution of the mantle Hard turbulent thermal convection and thermal evolution of the mantle

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.5355y&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. E3, p. 5355-5373.

Astronomy and Astrophysics

Astrophysics

38

Earth Mantle, Free Convection, Planetary Evolution, Planetary Temperature, Turbulence, Phase Transformations, Planetary Mantles, Rayleigh Number, Rheology

Scientific paper

Hard turbulent convection is investigated using laboratory experiments and numerical simulations. In Newtonian mantle convection, the appearance of disconnected plumes marks the transition from soft to hard turbulence. For non-Newtonian rheology, the transition to hard turbulence takes place at much lower Nusselt numbers than it does for Newtonian rheology. This has important ramifications for the mantle. Large curvatures are developed in the trajectories of non-Newtonian plumes in the hard turbulent regime, in contrast to the trajectories of Newtonian plumes. When phase transitions are considered, mantle convection tends to become more layered with increasing Rayleigh numbers. The manner of mantle convection might have changed with time from a layered to a more whole mantle type of flow. Superplume events could have been caused by catastrophic overturns associated with strong gravitational instabilities in the transition zone.

Affiliated with

Also associated with

No associations

Rating

Hard turbulent thermal convection and thermal evolution of the mantle 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 Hard turbulent thermal convection and thermal evolution of the mantle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hard turbulent thermal convection and thermal evolution of the mantle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1446567