Rights statement: ©2012 American Physical Society
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Crossover from hydrodynamic to acoustic drag on quartz tuning forks in normal and superfluid 4He
AU - Bradley, D. I.
AU - Clovecko, M.
AU - Fisher, Shaun
AU - Deepak, Deepak
AU - Guise, E.
AU - Haley, Richard
AU - Kolosov, O.
AU - Pickett, George
AU - Tsepelin, V.
AU - Schmoranzer, D.
AU - Skrbek, L.
N1 - ©2012 American Physical Society
PY - 2012/1/6
Y1 - 2012/1/6
N2 - 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.
AB - 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.
KW - SAMPLE DISTANCE CONTROL
KW - LIQUID-HELIUM
KW - TRANSVERSE VIBRATIONS
KW - OPTICAL MICROSCOPES
KW - TURBULENCE
KW - CAVITATION
KW - TRANSITION
KW - PRESSURE
KW - BARS
KW - FLOW
UR - http://www.scopus.com/inward/record.url?scp=84856508082&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.85.014501
DO - 10.1103/PhysRevB.85.014501
M3 - Journal article
AN - SCOPUS:84856508082
VL - 85
SP - -
JO - Physical review B
JF - Physical review B
SN - 1550-235X
IS - 1
M1 - 014501
ER -