Convective Heat Transfer
Heat generated in fuel, moderator, or structural materials is transferred to surfaces by heat conduction as explained in the previous chapter. Since there is a temperature difference between the fuel surface and the coolant around it, heat moves to the coolant flow. When a solid surface and a fluid contacting it have a temperature difference like this, heat movement between them is called heat transfer. In particular, heat transfer without a phase change of the fluid is called heat convection.