Fig. 5

The temperature distribution on the cut plane and cross-section at 2 min in the 17.5 V heating group: a illustration of the cut plane, which is the symmetry plane of the two electrodes; b the temperature distribution and isothermal line (50 °C) on the symmetry plane at 2 min; c illustration of the cross-section; d the temperature distribution and isothermal line (50 °C) on the cross-section at 2 min; e 3D isometric drawing of the 3D isothermal contour (50 °C) at 2 min; f top view of the 3D isothermal contour (50 °C) at 2 min; g illustration of the line between the electrodes on the cut plane; h the temperature gradient along the radial direction