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Numerical analysis of forced convection heat transfer of subcooled liquid nitrogen

Tatsumoto, Hideki; Shirai, Yasuyuki*; Hata, Koichi*; Kato, Takashi; Aso, Tomokazu; Otsu, Kiichi; Shiotsu, Masahiro*

The knowledge of forced flow heat transfer of liquid hydrogen is important for cooling design of hydrogen moderator system and HTS superconducting magnets such as MgB$$_{2}$$ magnet. The use of a CFD code is necessary to understand the heat transport phenomena in the practical cooling channel of the magnets. As a first step of the study, forced flow heat transfer of liquid nitrogen in a horizontal tube, instead of liquid hydrogen, was analyzed in this work by using a CFD code. The solutions were compared with the authors' experimental data under the corresponding conditions. The solutions obtained by using the low Reynolds number ${it k-$epsilon$}$ model as a turbulent model agreed well with the experimental data for the Reynolds numbers (${it Re}$) higher than 1$$times$$$$10^{4}$$. For ${it Re}$ $$<$$ 1$$times$$$$10^{4}$$, the solutions become lower than the experimental data. The heat transport mechanism in the horizontal tube was also clarified by the analyses.

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Category:Engineering, Electrical & Electronic

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