Fig. 4From: Mathematical modelling of mantle convection at a high Rayleigh number with variable viscosity and viscous dissipationStream function contours of a convection at different viscosity variations and at different pressure numbers for a fixed viscous dissipation number \(D=0.3\) with \(\theta _0 = 0.1\) and \({\mathrm{Ra}} = 10^7\)Back to article page