Transport properties of helium near the liquid-vapor critical point. IV. The shear viscosity of3He and4He

Agosta, C. C.; Wang, Suwen; Cohen, Lawrence H.; Meyer, Horst

doi:10.1007/bf00681831

Cited by 86 publications

(19 citation statements)

References 43 publications

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“…Experimental determinations for R D of one-component fluids near the vapor-liquid critical point have been reported for helium [32] and for xenon [33][34][35]. Agosta et al [32] have deduced a value R D = 1.05 ± 0.10 from their experimental data for helium and Wilkinson et al [35] have arrived at an experimental value R D = 1.00 ± 0.04 for xenon.…”

Section: Thermal Conductivity and Thermal Diffusivitymentioning

confidence: 95%

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Thermal Diffusivity of H2O Near the Critical Point

et al. 2009

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Section: Thermal Conductivity and Thermal Diffusivitymentioning

confidence: 95%

“…Agosta et al [32] have deduced a value R D = 1.05 ± 0.10 from their experimental data for helium and Wilkinson et al [35] have arrived at an experimental value R D = 1.00 ± 0.04 for xenon. The experimental information for H 2 O will be evaluated in the next section.…”

Section: Thermal Conductivity and Thermal Diffusivitymentioning

confidence: 97%

Thermal Diffusivity of H2O Near the Critical Point

et al. 2009

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“…In order to compare the various data issued from several references [25,26,27,28,29,30,31,32,33], we use the ITS-90 [34] critical temperature: T c = 5.1954 K and adjust the thermometer in-situ calibration onto that value. This calibration procedure is illustrated on figure 6 at We apply a small 125 µW heating power and monitor both ∆T across the Rayleigh-Bénard cell and the gas density ρ gas in the capacitive cell.…”

Section: Thermometrymentioning

confidence: 99%

Heat Transfer in Turbulent Rayleigh–Bénard Convection Below the Ultimate Regime

Roche

Castaing

Chabaud

et al. 2004

Journal of Low Temperature Physics

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A Rayleigh-Bénard cell has been designed to explore the Prandtl (Pr) dependence of turbulent convection in the cross-over range 0.7 < P r < 21 and for the full range of soft and hard turbulences, up to Rayleigh number Ra ≃ 10 11 . The set-up benefits from the favourable characteristics of cryogenic helium-4 in fluid mechanics, in-situ fluid property measurements, and special care on thermometry and calorimetric instrumentation. The cell is cylindrical with diameter/height = 0.5. The effective heat transfer Nu(Ra, P r) has been measured with unprecedented accuracy for cryogenic turbulent convection experiments in this range of Rayleigh numbers. Spin-off of this study include improved fits of helium thermodynamics and viscosity properties. Three main results were found. First the Nu(Ra) dependence exhibits a bimodality of the flow with 4 − 7% difference in Nu for given Ra and P r. Second, a systematic study of the side-wall influence reveals a measurable effect on the heat transfer. Third, the Nu(P r) dependence is very small or null : the absolute value of the average logarithmic slope (dlnNu/dlnP r) Ra is smaller than 0.03 in our range of P r, which allows to disciminate between contradictory experiments [Ashkenazi et al., Phys. Rev.Lett. 83:3641 (1999)] [Ahlers et al., Phys.Rev.Lett. 86:3320 (2001)].

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“…4, and the quality factor QE for the empty oscillator was again about 5 x 105. A linearity test was made similar to that described in Ref.…”

Section: Temperature Measurement and General Apparatus Performancementioning

confidence: 95%

“…However, if no such sharp anomaly close to T, were observed, either along the phase separation line or for mixtures with compositions near X,, we could expect that gravity effects will be unimportant in the measurement of pr/. a) 4 Xdens" -Xvisc" 3 …”

Section: Gravity Effectsmentioning

confidence: 99%

Shear viscosity measurements of liquid 4He and 3He-4He mixtures near the tricritical point

et al. 1992

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A torsional oscillator cell is described, by means of which simultaneous precision measurements of (prl) and of the molar volume can be made in liquid 4He-4He mixtures over the temperature range between 0.5 and 3 K. Here p is the mass density, rl the shear viscosity and in the superfluid phase they become the contributions p, and qn of the normal component. The results of ;l for 4He near the superfluid transition are compared with the predictions by Schloms, Pankert and Dohm, and by Ferrell. Measurements of (P~l) are reported for mixtures with 0.64 < X < O. 74, where X is the 3He mole fraction. Those for X =0.67 and 0.70 are compared with data by Lai and Kitchens. The viscosity experiments show no evidence of a weak singularity at the tricritical point.

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Transport properties of helium near the liquid-vapor critical point. IV. The shear viscosity of3He and4He

Cited by 86 publications

References 43 publications

Thermal Diffusivity of H2O Near the Critical Point

Thermal Diffusivity of H2O Near the Critical Point

Heat Transfer in Turbulent Rayleigh–Bénard Convection Below the Ultimate Regime

Shear viscosity measurements of liquid 4He and 3He-4He mixtures near the tricritical point

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