Journal
JOURNAL OF LOW TEMPERATURE PHYSICS
Volume 175, Issue 1-2, Pages 97-103Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10909-013-0920-8
Keywords
Resonator; Non-linear dissipation; Turbulence; Liquid helium
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Funding
- Academy of Sciences of the Czech Republic
- CONICET of Argentina [ASCR/CONICET 2013-4, 2012CZ002]
- Charles University in Prague [UNCE 2040]
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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 He-4.
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