Summary
Unlike in normal fluids the flow and heat transfer of cylindrical imploding temperature pulses in superfluid helium can be fairly easily investigated. This possibility was taken advantage of to study the influence of quantized vorticity on the flow process with strong geometric constraints and to check the validity of the simplified theoretical model and the numerical simulation procedure used. At weak heat pulses, when the linear approximation can be used, the analytical solution and the numerical procedure compare very well with the experimental results. For medium heat pulses, when quantum turbulence and non linearity become important, the qualitative agreement of the numerical simulations with experimental data is also very satisfactory, reproducing all the flow features and showing the strong interaction between the geometric and vorticity effects. However the quantitative differences are of the order of 20%.
Partially presented at the 1st ECFM, Cambridge, 1991 and ad the 18th ICTAM, Haifa, 1992.
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© 1994 Springer-Verlag
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Fiszdon, W., Olszok, T., Stamm, G., Noack, B., Piechna, J. (1994). Imploding cylindrical temperature pulses in superfluid helium. In: Schnerr, G.H., Bohning, R., Frank, W., Bühler, K. (eds) Fluid- and Gasdynamics. Acta Mechanica, vol 4. Springer, Vienna. https://doi.org/10.1007/978-3-7091-9310-5_35
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