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Earth, Planets and Space
Fig. 2 | Earth, Planets and Space

Fig. 2

From: Linear analysis on the onset of thermal convection of highly compressible fluids with variable viscosity and thermal conductivity in spherical geometry: implications for the mantle convection of super-Earths

Fig. 2

The plots against \(r_\eta \) of a the absolute minimum value of critical Rayleigh number \({\text{Ra}}_{c0}\) and b the spherical harmonic degree \(\ell _{c0}\) or horizontal wavenumber \(K_{c0}\) of perturbation corresponding to \({\text{Ra}}_{c0}\), obtained for different model geometries and various values of \(r_k\) in the range of \(1\le {r_k}\le 100\)

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