The fundamental characteristics of the two-dimensional cavitating flow of liquid helium through a horizontal converging-diverging nozzle near the lambda point are numerically investigated to realize the further development and high performance of new multiphase superfluid cooling systems. First, the governing equations of the cavitating flow of liquid helium based on the unsteady thermal nonequilibrium multifluid model with generalized curvilinear coordinates system are presented, and several flow characteristics are numerically calculated, taking into account the effect of superfluidity. Based on the numerical results, the two-dimensional structure of the cavitating flow of liquid helium though a horizontal converging-diverging nozzle is shown in detail, and it is also found that the generation of superfluid counterflow against normal fluid flow based on the thermomechanical effect is conspicuous in the large gas phase volume fraction region where the liquid to gas phase change actively occurs. Furthermore, it is clarified that the mechanism of the He I to He II phase transition caused by the temperature decrease is due to the deprivation of latent heat for vaporization from the liquid phase.
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September 2003
Technical Papers
Numerical Analysis of Cavitating Flow of Liquid Helium in a Converging-Diverging Nozzle
Jun Ishimoto, Associate Professor,,
Jun Ishimoto, Associate Professor,
Department of Intelligent Machines and System Engineering, Hirosaki University, 3, Bunkyo-cho, Hirosaki 036-8561, Japan
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Kenjiro Kamijo, Professor,
Kenjiro Kamijo, Professor,
Institute of Fluid Science, Tohoku University, Sendai 980-8577, Japan
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Jun Ishimoto, Associate Professor,
Department of Intelligent Machines and System Engineering, Hirosaki University, 3, Bunkyo-cho, Hirosaki 036-8561, Japan
Kenjiro Kamijo, Professor,
Institute of Fluid Science, Tohoku University, Sendai 980-8577, Japan
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division October 7, 2002; revised manuscript received April 1, 2003. Associate Editor: J. Katz.
J. Fluids Eng. Sep 2003, 125(5): 749-757 (9 pages)
Published Online: October 7, 2003
Article history
Received:
October 7, 2002
Revised:
April 1, 2003
Online:
October 7, 2003
Citation
Ishimoto, J., and Kamijo, K. (October 7, 2003). "Numerical Analysis of Cavitating Flow of Liquid Helium in a Converging-Diverging Nozzle ." ASME. J. Fluids Eng. September 2003; 125(5): 749–757. https://doi.org/10.1115/1.1601253
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