It is difficult to analyze local thermal equilibrium since the existing icing and melting-ice models generally neglect temperature field distribution. Consequently

we comparatively analyzed the thermal equilibrium and found that convection heat transfer is the main factor of heat loss during icing and ice-melting processes. We also established finite element models of bare conductors and iced conductors and obtained Nusselt number distribution curves of the objects under different Reynolds numbers. The simulation shows that there is a significant difference in convective heat transfer on iced conductor surface: the local average Nusselt number of-45°

4

5° around upwind area on a circular iced conductor is as 1.48 times much as general average Nusselt number when Reynolds number is 10 000

and for a bare conductor

the ratio is 1.45. Besides

the above-mentioned ratios sli

ghtly decreased with the increase of Reynolds number. Finally

the local average Nusselt number formula is obtained by fitting these numerical simulation data which can improve the accuracy of calculating convection heat transfer

showing that the research is of significance for improving icing and ice-melting models.