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  • 1995-1999  (2)
  • Ising model  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Coexistence curve equation for several onecomponent fluids in the vicinity of the critical point (1996)
    Springer
    International journal of thermophysics 17 (1996), S. 641-649 
    Details
    ISSN: 1572-9567
    Keywords: coexistence curse ; critical exponents ; critical point ; Ising model ; scaling laws ; universality classes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Based on the available literature data on (he temperature dependence of coexisting densities near the critical point for Ne, HD, N2, and C2,H4,. the disadvantages of using the extended scaling equation of the coexistence curve with the Ising exponent are shown, Combined statistical methods are proposed to reanalyze these data. For all the above-mentioned substances, in (he range of reduced temperature 1.3 x 10-4 〈 r 〈 6 x 10-3 to 2 x 10-2, we obtain for the order parameter a single-term fit, with the common value β=0.355. The fit describes the experimental densities with .m uncertainty ol 0,06 to 0.1%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01441510
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Scaling, crossover, and classical behavior in the order parameter equation for coexisting phases of benzene from triple point to critical point (1996)
    Springer
    International journal of thermophysics 17 (1996), S. 651-662 
    Details
    ISSN: 1572-9567
    Keywords: benzene ; coexistence curve ; critical behavior ; critical point ; Ising model ; order parameter ; scaling laws ; triple point
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The temperature dependence of the density along the coexistence curve of benzene in the vicinity of the critical point and in a wide temperature range down to the triple point was investigated, The original results as well as literature data were statistically treated, A regression analysis of data on the critical exponents and critical amplitudes used as fitting parameters in a model equations was curried out, An adequate description of the order parameter by the three-term scaling equation in the entire two-phase (liquid gas) region of benzene was obtained with experimental values ofβ 0 = 0.352 ± 0,003 and Δ = 1.3 ± 0.2, which are inconsistent with the Ising modelβ(0=0.325) and the Wegner exponent (Δ=0.5). respectively, It is shown that the equation with fixed classical exponents does not adequately describe the experimental data even far from the critical point.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01441511
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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