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  • Wiley-Blackwell  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Statistical models for surface renewal in heat and mass transfer. Part IV: Wall to fluidized bed heat transfer coefficients (1970)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 16 (1970), S. 464-471 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Heat transfer coefficients were measured for glass particles at the same wall surface of a fluidized bed for which glass particle residence times were measured in a previous study. The data compared well with theoretical predictions of the dependence of heat transfer coefficients on particle residence times. Heat transfer coefficients for metal particle systems, for which direct measurements of residence times were not available, were predicted with fair accuracy by estimating residence times from a dimensionless correlation proposed in a previous study. The ability of the particle surface renewal models to accurately predict heat transfer coefficients is strong evidence of their physical validity.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690160325
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  • 2
    Electronic Resource
    Electronic Resource
    Statistical models for surface renewal in heat and mass transfer. Part III: Residence times and age distributions at wall surface of a fluidized bed, application of spectral density (1970)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 16 (1970), S. 456-464 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A method was developed for estimating the age density of transporting elements at a transport surface by using the spectral density of the total element counts. Only total counts, and not individual element histories, need be observed. The method was compared with autocorrelation methods used in an earlier work. Residence times were measured for several sizes of particles at a paticular wall surface of a stirred fluidized bed and at various gas velocities using both spectral density and autocorrelation methods. A dimensionless plot brought all data points near a single curve, valid only for this surface in this bed. Checks of these residence times against values obtained by direct observation of individual particles confirmed the methods.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690160324
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  • 3
    Electronic Resource
    Electronic Resource
    Statistical models for surface renewal in heat and mass transfer: Part I. Dependence of average transport coefficients on age distribution (1966)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 12 (1966), S. 941-946 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Average transport coefficients for different transport models are computed by using widely varying distributions of residence times of elements at the transporting surface. It is shown that for typical transport models, the shapes of the residence time and age distributions have an insignificant effect on the average transport coefficient. Operational techniques for calculating average coefficients and for constructing delayed versions of age distributions are presented.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690120520
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    Paper (German National Licenses)
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