Measurement of He II evaporation induced by impingement of a thermal pulse on a He II–vapor interface

Measurement of He II evaporation induced by impingement of a thermal pulse on a He II–vapor... The transient evaporation phenomenon in a pure superfluid helium (He II)–vapor system was experimentally studied. Evaporation is caused by the impingement of a second sound thermal pulse onto a He II–vapor interface. The resulting gas dynamic phenomena are visualized with the aid of a laser holographic interferometer, and are also measured with a pressure transducer and a superconductive temperature sensor. It is clearly seen in the interferograms that a clear shock wave is formed at the front of an evaporation wave. We obtained the condensation coefficient of He II as being 0.70 ± 0.05 in the temperature range between 2.04 K and 1.74 K by the comparison of the experimental data with the kinetic theory results. Experiments in Fluids Springer Journals

Measurement of He II evaporation induced by impingement of a thermal pulse on a He II–vapor interface

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Copyright © 2001 by Springer-Verlag Berlin Heidelberg
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
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