Thermal conductivity of subcooled liquid oxygen

Celik, D.; Sciver, S.W. Van

doi:10.1016/j.cryogenics.2005.05.004

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…Phenomena related to basic thermal and transport properties such as the extremely low value of the vapor pressure at the triple point ͑ϳ1.5 mbar͒, its large viscosity if compared to nitrogen, 26 or the anomalously large decrease with temperature of the thermal conductivity 34 are all attributed to the presence of magnetic correlations. The way in which such dynamic phenomena give rise to the alluded behaviors is now beginning to be understood on semiquantitative grounds within some theoretical approaches.…”

Section: Discussionmentioning

confidence: 99%

Spin dynamics in liquid and rotationally disordered solid oxygen

et al. 2008

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The spin and nuclear dynamics of the liquid and plastic-solid phases of molecular oxygen are studied by means of inelastic neutron scattering. A detailed spectral analysis over wide energy-͑0-18 meV͒ and momentum-͑0.2-4.5 Å −1 ͒ transfer ranges permits a robust separation of magnetic and nuclear contributions to the dynamic structure factor. Reliable spin-exchange constants are obtained for both liquid and plastic phases, which are found to be remarkably similar to each other, with no evidence for long-range antiferromagnetic spin correlations beyond next-nearest neighbors. Analysis of the time scales involved in spin-flip processes suggests that spin diffusion in these structurally disordered phases takes place within a lapse of time comparable to the lifetime of an O 4 unit in the liquid.

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Section: Discussionmentioning

confidence: 99%

Spin dynamics in liquid and rotationally disordered solid oxygen

et al. 2008

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“…The principal classification of the existing methods is based on the temporal evolution of thermal treatment. In this way, some techniques can be found based on steady-state heat transfer [1]. The technique seems to ensure good results but requires relatively complex and expensive equipment.…”

Section: Introductionmentioning

confidence: 99%

Measuring the thermal conductivity of liquids using photo-thermal radiometry

Kusiak¹,

Pradère²,

Battaglia³

2009

Meas. Sci. Technol.

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A method for the estimation of thermal conductivity of liquids is proposed. The measurement is based on the front face-modulated photothermal radiometry usually used for studies of solid deposit (thin film) on substrate systems. The system considered here is in the three-layer form, the intermediate layer being the investigated liquid. An experimental setup has been developed in order to avoid the drawbacks of the classical methods such as flash or hot wire measurement. The measurement is carried out with low-temperature oscillations, and the studied liquid is confined in a specific (low thickness) container. This configuration leads to very low Rayleigh number and permits us to eliminate the convection phenomenon during the experiment and to characterize a very small (∼1 μl) volume of liquid. This is an important feature for metrology of expensive or hazardous samples. According to the knowledge of the thermophysical properties of two solid layers external to a liquid, the phase lag between the thermal perturbation and the response of the sample is used as the experimental data. The measurement was validated using two well-known liquids: water and sunflower oil.

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“…In order to freely vary the boundary temperatures, cryocoolers have been successfully used with other thermal conductivity measurement systems [9]. In the present paper, the design of a concentric cylinder calorimeter to measure the apparent thermal conductivity of MLI blankets is presented.…”

Section: Introductionmentioning

confidence: 99%

An apparatus to measure the apparent thermal conductivity of multilayer insulation (MLI)

Celik¹,

Klimas²,

Sciver³

et al. 2012

AIP Conference Proceedings

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The design of a concentric cylinder calorimeter for measuring the apparent thermal conductivity of MLI blankets is presented. Unlike similar devices where a liquid cryogen is used to control the cold boundary temperature and the cryogen boil-off rate is used to obtain the heat transfer through blanket, the design presented in this paper utilizes mechanical refrigerators to control the boundary temperatures and a heat rate meter to determine the heat load. This approach ensures two unique features of the apparatus. First, the use of cryocoolers enables the user to set the boundary temperatures anywhere within the operating range of the refrigerators and therefore permits a wide range of temperature and temperature differences with the measurement. The other unique feature is that the total heat transfer through the blanket is obtained by measuring the heat conducted along a cold cylinder support rod of known thermal conductivity. To determine the absolute thermal conductivity, a calibration is needed to eliminate the temperature related effects on the support rod.

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Thermal conductivity of subcooled liquid oxygen

Cited by 4 publications

References 6 publications

Spin dynamics in liquid and rotationally disordered solid oxygen

Spin dynamics in liquid and rotationally disordered solid oxygen

Measuring the thermal conductivity of liquids using photo-thermal radiometry

An apparatus to measure the apparent thermal conductivity of multilayer insulation (MLI)

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