2022 年 57 巻 4 号 p. 254-260
The computational fluid dynamics (CFD) analysis was carried out on the experimental results of measuring heat transfer from the inside of a vertical pipe of 6 mm inner diameter and 100 mm length to forced flow of hydrogen at the pressure of 1.5 MPa. In the CFD analysis, heat flux was applied to the pipe surface as in the experiment, and the effect of flow velocity was clarified. The slope of the heat transfer curve obtained by the CFD analysis decreased as the wall heat flux increased, showing the same tendency as the experimental results. The friction loss coefficient was calculated based on the analytical results, and a new evaluation formula was proposed to express the friction loss coefficient obtained by numerical analysis.
