NDLI: Numerical Analysis of Forced Convection Heat Transfer of Subcooled Liquid Nitrogen

Content Provider	IEEE Xplore Digital Library
Author	Tatsumoto, H. Shirai, Y. Hata, K. Kato, T. Aso, T. Ohtsu, K. Shiotsu, M.
Copyright Year	2002
Abstract	The knowledge of forced flow heat transfer of liquid nitrogen and liquid hydrogen is important for cooling design of large scale HTS superconducting magnets wound with YBCO, BSCCO or MgB₂ conductor adopting indirect cooling or inner conductor cooling, such as CICC configuration. As a first step of the study, forced flow heat transfer of liquid nitrogen in a horizontal tube was analyzed in this work by using a CFD code. The use of a CFD code is necessary to understand the influence of a configuration and a direction dependency of a cooling channel on the local heat transport phenomena in the practical cooling channel of the magnet. The solutions obtained by using the low Reynolds number kappa-epsiv model as a turbulent model agreed with the authors' experimental data and with the values predicted by the Dittus-Boelter (D-B) correlation for the Reynolds numbers (Re) higher than 1 times 10⁴.For Re < 1 times 10⁴, the solutions tend to approach the solutions for the laminar flow. Local heat transfer at circumferential and longitudinal positions in the horizontal tube was analyzed for various flow velocities. Large circumferential and longitudinal temperature distributions were observed in the solutions for Re < 1 times 10⁴. Local temperature change of a magnet in a cooling channel which cannot be evaluated by using the conventional heat transfer correlation such as D-B correlation should be considered for the cooling design of the large scale forced flow cooling HTS magnets.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1483
Ending Page	1486
Page Count	4
File Size	660814
File Format	PDF
ISSN	10518223
Volume Number	18
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Numerical analysis Heat transfer Nitrogen Cooling Superconducting magnets Large-scale systems High temperature superconductors Conductors Magnetic analysis Computational fluid dynamics turbulent model Forced convection heat transfer liquid nitrogen
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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