In order to understand natural convection heat transfer of molten nitrate

natural convection heat transfer of lithium nitrate (LiNO3) and multi-components nitrate around a horizontal cylinder with different diameters (0.1

0.4

1

4

10

40 mm) at different medium temperatures (573

623

673 K) was studied by simulation. The results fitted best with the Fand's correlation comparing with different classic correlations. After analysis of all calculated data

a simple correlation was proposed for predicting laminar natural convection heat transfer of molten nitrate around a horizontal cylinder. Compared with the natural convection experiment data of LiNO3

the proposed correlation had a maximum uncertainty of ±20%

and the reliability of the proposed correlation was verified.