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

被引：57

作者：

Bradley, D. I. ^{[1
]}

Clovecko, M. ^{[1
]}

Fisher, S. N. ^{[1
]}

Garg, D. ^{[1
]}

Guise, E. ^{[1
]}

Haley, R. P. ^{[1
]}

Kolosov, O. ^{[1
]}

Pickett, G. R. ^{[1
]}

Tsepelin, V. ^{[1
]}

Schmoranzer, D. ^{[2
]}

Skrbek, L. ^{[2
]}

机构：

[1] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

[2] Charles Univ Prague, Fac Math & Phys, CR-12116 Prague, Czech Republic

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

SAMPLE DISTANCE CONTROL; LIQUID-HELIUM; TRANSVERSE VIBRATIONS; TURBULENCE; CAVITATION; TRANSITION; FLOW;

D O I：

10.1103/PhysRevB.85.014501

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present measurements of the drag forces on quartz tuning forks oscillating at low velocities in normal and superfluid He-4. 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.

引用

页数：9

共 31 条

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