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  • Other Sources  (2)
  • 1980-1984  (2)
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  • 1
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    Unknown
    Homogeneous nucleation of ethanol and n-propanol in a shock tube (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The condensation by homogeneous nucleation of ethanol (200 proof) and of n-propanol (99.98%) carried at small mole fraction in dry air (99.995%) was studied in the unsteady, isentropic expansion of a shock tube. Samples of the vapor at different partial pressures in dry air at room temperature were expanded into the liquid coexistence regime of the condensing species. A Kristler pressure transducer and Rayleigh light scattering were used to measure the pressure in the expansion and the onset of condensation. Condensation was observed at different locations between 0.15 and 1 m upstream of the diaphragm location, which correspond to different cooling rates of of the vapor samples about 50 to 10 C/ms.
    Keywords: CHEMISTRY AND MATERIALS (GENERAL)
    Type: Journal of Chemical Physics; 77; Nov. 1
    Format: text
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  • 2
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    Unknown
    A new method to measure homogeneous nucleation rates in shock tubes (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The centered expansion wave of a shock tube is utilized to expand and supersaturate a condensable vapor in small concentration in an inert carrier gas. The supersaturated state, located at the rear of the expansion wave, is preserved for a controlled period and then terminated by a recompressing shock wave. During the period of supersaturation, condensation nuclei are formed homogeneously. The nucleation rate is measured as a function of supersaturation by a Mie-light scattering technique. The method is tested using water and the results are compared with classical nucleation theory.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: Experiments in Fluids (ISSN 0723-4864); 1; 3 19; 1983
    Format: text
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