Criterion for quantum turbulence onset after rectangular heat pulse in superfluid helium |
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Authors: | R. Wang |
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Affiliation: | Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200030, P.R. China |
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Abstract: | On the basis of transient heat transfer measurements of the film boiling onset time in a He II bath, a criterion correlated to the bath temperature and pressure for quantum turbulence onset after a rectangular heat pulse in superfluid helium is shown. Using the criterion parameter α it is possible to determine the time τ needed to initiate quantum turbulence in the He II bath after a rectangular heat pulse. It is found that the criterion value in a He II bath is much smaller than that for He II confined in small channels. A strong pressure effect is also exhibited. |
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Keywords: | superfluid helium quantum turbulence criterion |
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