Correlated thermal conductivity data of rare gases and their binary mixts. at ordinary pressures

Gandhi, J. M.; Saxena, S.C.

doi:10.1021/je60038a016

Cited by 30 publications

(4 citation statements)

References 21 publications

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“…In contrast, using the force constants suggested by DiPippo and Kestin The mixture thermal conductivity decreases by a factor of 23 as the molecular weight increases from pure helium to pure xenon over the range of mixture temperature in this investigation, and mixture conductivity also Gandhi and Saxena [1968] have observed that the measurements of Mason and von Ubish appear to be systematically higher than others they reviewed.…”

Section: Vyrt= V(5/3)rtcontrasting

confidence: 75%

Internal forced convection to low-Prandtl-number gas mixtures

Taylor

Bauer

McEligot³

1988

International Journal of Heat and Mass Transfer

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Section: Vyrt= V(5/3)rtcontrasting

confidence: 75%

Internal forced convection to low-Prandtl-number gas mixtures

Taylor

Bauer

McEligot³

1988

International Journal of Heat and Mass Transfer

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“…in degrees Kelvin and K has units of W/m -K. The conductivi t y of a gas mixture is based on the work of Brokaw< 58 ) and can be determi ned from: conducti vity as given by Equation 56( 57) The accommodation coefficient (a) used in the model calculation is based on results by Ullman et al . (sg) who measured the accornodation coefficients of 5…”

mentioning

confidence: 99%

Ex-reactor determination of thermal gap and contact conductance between uranium dioxide: zircaloy-4 interfaces. Stage I: low gas pressure. [PWR; BWR]

Garnier¹,

Begej²

1979

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This report was prepared u an account of work sponsored by the United States Government. Neither the United States nor the United States Nuclear Regulatory Commission, nor any of their employees, nor any of their contractors, subcontracton, or their employees, makes any warrant)', express or implied, or assumes any legal liability or responsibility for the accuracy, completeness or usefuln~s of any information, apparatus, product or process disclosed, or represents that its use would not infringe privately owned rights.

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“…When a similar procedure was adopted at about 90°C for Ne, N2, and 02, the differences in the two sets were less than 0.2%. The correlated values of k as a function of temperature for neon as given by Gandhi and Saxena (6) were used in the data reduction. These studies again establish our contention of the almost complete absence of convection and the procedure of determining conductivity from readings when the platinum wire was heated about 4°C above the bath temperature.…”

mentioning

confidence: 99%

Experimental data and procedures for predicting thermal conductivity of binary mixtures of nonpolar gases

Saxena¹,

Tondon²

1971

J. Chem. Eng. Data

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The thermal conductivities of Ne, Ai, Kr, Xe, Hz, 02 Nz, and 0 2 are measured using a thick hot-wire metal cell at five temperatures in the range 40-175OC. The solution of the heat balance equation as developed by Oldham andvluchsinger is employed, and w e estimate an accuracy of 1-2% in our recommended absolute conductivity values. In this temperature range, the thermal conductivities of the binary systems Ne-Hz, Ne-Nn, Ne-02, Hz-Dz, Nz-Dz, Hz-Nz, N2-02, Kr-Hn, Xe-Hz, Xe-Dz, and Xe-Ar are also determined as a function of composition. On the basis of these experimental data, the methods of prediction of thermal conductivity of mixtures due to Hirschfelder, Mason and Saxena, Mathur and Saxena, Lindsay and Bromley, Ulybin et al., and Burgoyne and Weinberg are examined with a view to ascertain their relative accuracies. The framework of Chapman-Enskog kinetic theory in conjunction with the experimental data on thermal conductivity is used to generate the diffusion and viscosity coefficients for Xe-Ar, Xe-Dn, Ne-Hz, Ne-Nn, and Ne-02, as representative systems.R e c e n t l y Saxena and Gupta (26) have reported experimental thermal conductivity data on eight pure gases, four of their binary, two ternary and two quaternary systems as a function of composition. The measurements were taken on a metal hot-wire cell with a thick platinum wire as a hot surface, and a t temperatures of 40", 65", and 93'C.Here we report the thermal conductivities of the binary systems Ne-H2, Ne-N2, Ne-On, HZ-Dn, NZ-DZ, Hn-Nz, Nz-02, Kr-Hz, Xe-H2, Xe-D2, and Xe-Ar as a function of composition and of the related eight pure gases a t 40°, 65", 930, 950, 135", and 175"C, using the same hot-wire cell. The details of the experimental arrangement, procedure of calculation, and comparisons of the experimental conductivity values with some of the semitheoretical procedures are given in the following sections. EXPERIMENTALA metal hot-wire cell of nominal length 10.44 cm and an internal diameter of 0.6412 cm was used for measurements; its details of design, construction, and precision are given by Gambhir et al. ( 3 ) . The cell was connected to a high-vacuum pumping system and could be evacuated to less than cm of mercury pressure. The gas mixtures were made with an accuracy of 20.01% in a specially designed gas-mixing unit [Gambhir and Saxena ( 4 ) ] . The gas or gas mixture was transferred into the cell a t the desired pressure by a mercury lift system. The cell was mounted vertically in a thermostat bath, and the gas was left in it at the desired pressure from 1-4 hr to acquire thermal equilibrium before measurements were taken.Two different thermostat baths were used. The first one is the same as described by Saxena and Gupta (26) and was used for measurements at 40°, 65", and 93°C. Another bath was carefully designed for work a t higher temperatures, and measurements are reported here taken a t 95", 135", and 175°C. A brief description of this bath is given here. It consisted of a cylindrical double-walled stainless steel bath of diameter 20 cm an...

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Correlated thermal conductivity data of rare gases and their binary mixts. at ordinary pressures

Cited by 30 publications

References 21 publications

Internal forced convection to low-Prandtl-number gas mixtures

Internal forced convection to low-Prandtl-number gas mixtures

Ex-reactor determination of thermal gap and contact conductance between uranium dioxide: zircaloy-4 interfaces. Stage I: low gas pressure. [PWR; BWR]

Experimental data and procedures for predicting thermal conductivity of binary mixtures of nonpolar gases

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