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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    International journal of thermophysics 11 (1990), S. 37-48 
    ISSN: 1572-9567
    Keywords: concentration fluctuations ; critical phenomena ; fractal dimensionality ; liquid mixtures ; percolation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Microscopic observations of concentration fluctuations in the range 1–500 μm have been performed in a number of binary fluids near their critical temperature (T c). A heterodyne technique has been used. The temperature range (T-T c = 1–25 mK) is such that the sizes of the fluctuations are larger than or equal to the correlation length, measured usually as the inverse half-width of the structure factor of the fluctuations. Image analysis has given some information about the free energy of the system determined from the intensity distribution function. Also, the shape of the fluctuations can be studied. These are self-similar over more than three decades, with a fractal dimension of D f = 2.8. This value is compared with a number of theoretical predictions.
    Type of Medium: Electronic Resource
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