抄録
A numerical study has been done for natural convection heat transfer in the joint part of a cylindrical thermal insulation structure with a metallic outer shell. If the joint is relatively narrow, the effect of natural convection which occurs inside the joint on the thermal insulation performance is small. Although the heat transfer rate increases as joint width becomes large, the increase in the heat transfer rate is less than 10 percent, even when the joint width is 10mm.
