This type of initial thermal state of the mantle is expected to naturally occur in real super-Earths due to heating by giant impacts at the time of their formation. With our initial setup conditions, the convection temporarily occurs as a layered convection for the first several to ten billion...
The isotope boundary occurs over less than 200km within the Australian–Antarctic Discordance, a technically complex region believed to overlie a zone of downwelling mantle flow.doi:10.1038/333623a0Klein, E. M.Langmuir, C. H.Zindler, A.
The goal is to combine the Stokes and energy equations with a realistic rheology, thereby letting us understand the complex dynamic coupling that occurs in the mantle and that gives rise to plate tectonics and other surface features. This approach holds great promise because it makes a tremendous...
These differences emphasize the importance of developing even more realistic models at realistic Rayleigh numbers if one wishes to investigate by numerical simulation the type of convection that occurs in the Earth's mantle.doi:10.1080/03091928808213626...
A second transition occurs at higher Rayleigh numbers, Ra≈5×106, with large-scale time-dependent flow being replaced by isolated rising and sinking plumes. Corresponding to the latter transition, the exponent β in the power law relating the Nusselt number Nu to the Rayleigh number (Nu∼Ra...
Large aspect-ratio cells are found to exist, however, they are time-dependent even at small values of the Rayleigh number. In the absence of internal heating, the onset of time-dependence occurs as a regular oscillation in the flow characteristics (Nusselt number, kinetic energy), and is ...
6.There are three main ways by which heat transfer occurs, conduction,convectionand radiation. 传导、对流辐射。 「学大揭秘」评价该例句:好评差评指正 小杂文 7.Convection, the heating principle on which most earth-based ovens run, doesn't work in orbit. ...
2) Convection is the process by which heat is transferred from one part of a fluid to another by movement of the fluid itself. There are two methods in which this can be carried out. One is by natural convection, in which movement occurs as a result of gravity, the hot part of the ...
Learn the definition of a convection current and discover where it occurs. Understand various convection current examples and find how they work with a diagram. Updated: 11/21/2023 Table of Contents What are Convection Currents? Convection Current Examples Where do Convection Currents Occur? What ...
IT is not yet known whether convection in the Earth's mantle occurs in cells that extend throughout the entire depth of the mantle, or if the upper and lower mantle convect in independent layers; both possibilities seem to be consistent with geochemical and seismologi-cal observations 1-4 ....