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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    International journal of thermophysics 20 (1999), S. 1299-1311 
    ISSN: 1572-9567
    Keywords: aluminum ; average atom model ; plasma conductivity ; resistivity ; Ziman theory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We recall briefly how the Ziman theory of electrical conductivity, first proposed for solids and liquid metals, has been extended to the case of plasmas. The physical assumptions and parameters entering the formula are analyzed. A self-consistent model of electronic and ionic structure of plasmas is then described and applied to the calculation of the resistivity. Results obtained for aluminum are shown and compared to measurements done by Benage, along a thermo-dynamic path going from normal density at melting to 0.03 compression at 41 eV. The important differences between theory and experiment are discussed. The uncertainties inherent to the theory are emphasized, and physical effects not taken into account in the theory are discussed. Finally, the need for accurate measurements is emphasized.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    International journal of thermophysics 16 (1995), S. 1059-1067 
    ISSN: 1572-9567
    Keywords: CO2 ; critical-point phenomena ; thermal diffusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Heat transport in supercritical CO2 is studied under microgravity conditions. A large temperature and densityρ region around the critical point is explored (CO2 cells were filled at critical densityρ=ρ c and off-critical densitiesρ=ρ c±0.18ρ c). Local heating is obtained by using a small thermistor located in the bulk fluid. Through interferometric observations, a new mechanism of thermalization has been evidenced. Thermal expansion of a warm diffusing boundary layer around the heating thermistor is responsible for rapid adiabatic heating of the bulk fluid through the emission of pressure waves at the border. The scaled thickness of the thermal boundary layer follows a power law. When the heat flow stops, the bulk adiabatic heating instantaneously vanishes and the temperature relaxation inside the thermal boundary layer follows locally a diffusive process.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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