Heat transfer characteristics of cryogenic helium gas through a miniature tube with a large temperature difference

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Heat transfer with a large temperature difference between the inlet and outlet flows is often encountered in many cryogenic systems. The heat transfer characteristics of cryogenic gas with temperature-dependent thermophysical properties (TDTP) are different from those in the ambient condition with constant thermophysical properties. In this paper, a combined experimental and numerical study has been conducted to determine the heat transfer characteristics of cryogenic helium gas with temperature-dependent thermophysical properties in a miniature tube. In order to validate the theoretical model, an experimental investigation was conducted. Utilizing the validated model with the FLUENT software, the temperature distribution and velocity profile in a miniature tube have been calculated, and a correlation predicting the temperature effect on the Nusselt number determined. (C) 2004 Published by Elsevier Ltd.
Publisher
ELSEVIER SCI LTD
Issue Date
2004-12
Language
English
Article Type
Article
Keywords

FLOW; EXCHANGERS; CHANNELS; REFRIGERATORS; MICROCHANNEL; R134A

Citation

CRYOGENICS, v.44, no.12, pp.859 - 866

ISSN
0011-2275
DOI
10.1016/j.cryogenics.2004.05.005
URI
http://hdl.handle.net/10203/19816
Appears in Collection
ME-Journal Papers(저널논문)
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