On cavitation in liquid helium in a flow due to a vibrating quartz fork
M. Blazkova1, D. Schmoranzer2, and L. Skrbek1,2
1Joint Low Temperature Laboratory Institute of Physics ASCR, Na Slovance 2, 182 21 Prague, Czech Republic
2Faculty of Mathematics and Physics, Charles University, V Holešovickách 2, 180 00 Prague, Czech Republic
Received November 27, 2007
Cavitation in normal and superfluid liquid 4He at saturated vapor pressure and slightly elevated pressures
has been experimentally studied in a flow due to quartz forks vibrating at high amplitudes. Above the temperature- and pressure-dependent critical velocity, heterogeneous cavitation is observed both visually and electrically, as a breakdown of the resonance response of the fork.We compare our results with available experimental and discuss them using existing theoretical models. In particular, we show that thermal effects leading to local overheating of the vicinity of the fork have to be taken into account, especially in normal liquid 4He.
PACS: 47.55.dp Drop and bubble formation.
Ключевые слова: cavitation, He I, He II, quartz tuning f