Abstract
In the studies of both classical and quantum turbulence, significant attention is devoted to the investigation of the behavior of various submerged resonators. Upon entering the turbulent regime, the oscillators start to experience a significant drag force, which varies non-linearly with velocity. We present an empirical way of modeling such systems, and calculate the expected resonant response of such oscillators near the fundamental frequency as a function of the applied driving force. We apply the model to the crossover from linear to non-linear drag forces and compare with previous models as well as selected experimental data on the transition to turbulence in oscillatory flow of 4He.
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Acknowledgements
We would like to thank the Academy of Sciences of the Czech Republic and CONICET of Argentina for making this collaboration possible under Joint Projects ASCR/CONICET 2013-4, 2012CZ002. DS also acknowledges institutional support of Charles University in Prague under UNCE 2040.
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Schmoranzer, D., Jackson, M.J. & Luzuriaga, J. On the Non-linear Damping of Mechanical Oscillators in Flows of 4He. J Low Temp Phys 175, 97–103 (2014). https://doi.org/10.1007/s10909-013-0920-8
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DOI: https://doi.org/10.1007/s10909-013-0920-8