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  • 1
    Electronic Resource
    Electronic Resource
    The thermal conductivity of ethane in the critical region (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 92 (1990), S. 5454-5462 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: New experimental data are presented for the thermal conductivity of ethane. The thermal conductivity has been measured with a parallel-plate method as a function of temperature along eleven different isochores so as to obtain detailed information on the enhancement of the thermal conductivity in the critical region. The experimental results appear to be consistent with a recently proposed theoretical equation that accounts for both the asymptotic and nonasymptotic critical behavior of the thermal conductivity of fluids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458523
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  • 2
    Electronic Resource
    Electronic Resource
    The thermal conductivity of argon in the critical region (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 6944-6963 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have measured the thermal conductivity of argon at temperatures from 302 K down to 150.8 K and at densities up to 25 mol L−1. The data were obtained with a steady-state method and we employed a guarded parallel-plate apparatus designed especially for investigating the thermal conductivity of fluids in the critical region. To interpret the data in the critical region a scaled crossover equation of state for argon in the critical region has been constructed. Equations for the thermal conductivity and viscosity of argon as a function of density and temperature are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.468322
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  • 3
    Electronic Resource
    Electronic Resource
    A guarded parallel-plate instrument for measuring the thermal conductivity of fluids in the critical region (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 3466-3474 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A description is given of the construction and operating procedure of a parallel-plate apparatus for the measurement of the thermal conductivity coefficient of fluids. This instrument can be operated at pressures up to 150 MPa and at temperatures down to 77 K. The use of platinum resistance temperature sensors allows measurements with temperature differences between upper and lower plate as small as 1 mK, which together with the small plate separation of 155 μm, makes the instrument suitable for both the normal fluid region as well as for the region very close to the critical point. The complete working equations for the instrument are presented and evaluated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140494
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  • 4
    Electronic Resource
    Electronic Resource
    The thermal conductivity of methane in the critical region (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 105 (1996), S. 10535-10555 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have measured the thermal conductivity of methane at temperatures from 308 K down to 190.585 K, which is just 21 mK above the critical temperature, and at densities up to 14 mol L−1. The data were obtained with an improved guarded parallel-plate cell with a new cryostat that was built especially for measurements in the critical region of methane. The new experimental data have a higher accuracy than those reported previously in the literature and enable us to examine the validity of the currently available theoretical description of the asymptotic and nonasymptotic behavior of the thermal conductivity of fluids in the critical region. Equations for the thermal conductivity of methane in a wide range of temperatures and densities are also presented. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.472943
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  • 5
    Electronic Resource
    Electronic Resource
    The thermal conductivity of an equimolar methane–ethane mixture in the critical region (1998)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 109 (1998), S. 717-736 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have measured the thermal conductivity of an equimolar mixture of methane and ethane in the vicinity of the critical point. The new experimental data confirm that the thermal conductivity of a mixture does not diverge at the critical point but crosses over to a finite limiting behavior at the critical point. A quantitative representation of the thermal-conductivity data has been obtained in terms of a recently developed extension of the mode-coupling theory that incorporates the crossover between the behavior of the thermal conductivity close to and far away from the critical point. The same theory enables us also to predict other transport properties of the mixture in the vicinity of the critical point. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.476611
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  • 6
    Electronic Resource
    Electronic Resource
    Thermal effects in compressible viscous flow in a capillary (1993)
    Springer
    International journal of thermophysics 14 (1993), S. 865-892 
    Details
    ISSN: 1572-9567
    Keywords: capillary flow ; compressible flow ; entry length ; expansion cooling ; temperature field ; viscous dissipation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The thermal effects for a compressible viscous flow in a capillary have been calculated by solving the equation of energy, where a parabolic profile is assumed for the axial flow velocity. It is shown that, in general, the temperature changes are small (a few millikelvins), consistent with the current assumption of an isothermal flow, except in the case of a critical, i.e., very compressible, fluid where the cooling can be substantial. This effect is demonstrated numerically on the basis of a flow of ethylene in nearly critical circumstances.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00502113
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  • 7
    Electronic Resource
    Electronic Resource
    Measurements of the thermal conductivity of nitrogen with a parallel-plate instrument (1990)
    Springer
    International journal of thermophysics 11 (1990), S. 597-601 
    Details
    ISSN: 1572-9567
    Keywords: measurement techniques ; nitrogen ; parallel-plate apparatus ; thermal conductivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A parallel-plate apparatus is suited for accurate measurements of the thermal conductivity coefficient of fluids over a wide range of densities. This is illustrated by measurements of the thermal conductivity coefficient of nitrogen at a temperature of 308.15 K and at pressures up to 20.1 MPa with an accuracy of 0.5%. The agreement with a recent correlation based on accurate measurements by other authors is satisfactory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00500849
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  • 8
    Electronic Resource
    Electronic Resource
    Critical parameters of mixtures of carbon dioxide and ethane (1992)
    Springer
    International journal of thermophysics 13 (1992), S. 1043-1052 
    Details
    ISSN: 1572-9567
    Keywords: carbon dioxide ; critical parameters ; critical phenomena ; ethane ; plait point
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper deals with an evaluation of the critical parameters reported for mixtures of carbon dioxide and ethane. Equations are presented for the critical parameters as a function of the concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01141214
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  • 9
    Electronic Resource
    Electronic Resource
    The thermal conductivity of ethane in the critical region (1989)
    Springer
    International journal of thermophysics 10 (1989), S. 409-415 
    Details
    ISSN: 1572-9567
    Keywords: critical region ; ethane ; thermal conductivity ; thermal diffusivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The thermal conductivity of ethane in the critical region has been measured isochorically at densities up to 1.76 times the critical density and at temperatures down to 0.13 K above the critical temperature. The measurements were performed with a thermal conductivity apparatus based on the parallelplate method. The experimental accuracy was 0.5 to 5%, depending on the distance to the critical point. The experimental results agree well with a recently developed crossover theory for the thermal diffusivity of fluids in the critical region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01133537
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  • 10
    Electronic Resource
    Electronic Resource
    An Improved Guarded Parallel-Plate Method for Measuring the Thermal Conductivity of Fluids in the Critical Region (1999)
    Springer
    International journal of thermophysics 20 (1999), S. 1339-1366 
    Details
    ISSN: 1572-9567
    Keywords: critical phenomena ; parallel-plate method ; thermal conductivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A description is presented of the construction and operating procedure of an improved guarded parallel-plate instrument for measuring the thermal conductivity of fluids in the critical region. With the improved arrangement, it has been possible to reduce the temperature differences across the fluid layer between the two horizontal plates to values as low as 0.3 mK, thus allowing the thermal conductivity of fluids to be measured at temperatures as close as 20 mK to the critical temperature. The instrument has been used to measure the thermal conductivity of methane and of a mixture of methane and ethane in the close vicinity of the critical point.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1021476702452
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