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Crossover from hydrodynamic to acoustic drag on quartz tuning forks in normal and superfluid 4He

Bradley, D. I. and Clovecko, M. and Fisher, Shaun and Deepak, Deepak and Guise, E. and Haley, Richard and Kolosov, O. and Pickett, George and Tsepelin, V. and Schmoranzer, D. and Skrbek, L. (2012) Crossover from hydrodynamic to acoustic drag on quartz tuning forks in normal and superfluid 4He. Physical Review B, 85 (1). -. ISSN 1550-235X

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    Abstract

    We present measurements of the drag forces on quartz tuning forks oscillating at low velocities in normal and superfluid 4He. We have investigated the dissipative drag over a wide range of frequencies, from 6.5 to 600 kHz, by using arrays of forks with varying prong lengths and by exciting the forks in their fundamental and first overtone modes. At low frequencies the behavior is dominated by laminar hydrodynamic drag, governed by the fluid viscosity. At higher frequencies acoustic drag is dominant and is described well by a three-dimensional model of sound emission.

    Item Type: Article
    Journal or Publication Title: Physical Review B
    Additional Information: ©2012 American Physical Society
    Uncontrolled Keywords: SAMPLE DISTANCE CONTROL ; LIQUID-HELIUM ; TRANSVERSE VIBRATIONS ; OPTICAL MICROSCOPES ; TURBULENCE ; CAVITATION ; TRANSITION ; PRESSURE ; BARS ; FLOW
    Subjects: UNSPECIFIED
    Departments: UNSPECIFIED
    ID Code: 52367
    Deposited By: ep_importer_pure
    Deposited On: 23 Jan 2012 09:55
    Refereed?: Yes
    Published?: Published
    Last Modified: 23 Jul 2014 14:57
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/52367

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