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  • 1
    Electronic Resource
    Electronic Resource
    Approximate solutions for drag coefficient of bubbles moving in shear-thinning elastic fluids (1985)
    Springer
    Rheologica acta 24 (1985), S. 202-206 
    Details
    ISSN: 1435-1528
    Keywords: Bubble ; drag coefficient ; shear-thinning elastic fluid ; Ellis model ; Carreau model
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract The drag coefficient for bubbles with mobile or immobile interface rising in shear-thinning elastic fluids described by an Ellis or a Carreau model is discussed. Approximate solutions based on linearization of the equations of motion are presented for the highly elastic region of flow. These solutions are in reasonably good agreement with the theoretical predictions based on variational principles and with published experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01333248
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  • 2
    Electronic Resource
    Electronic Resource
    Influence of very small bubbles on kLa measurement in viscous microbiological cultures (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 30 (1987), S. 345-347 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: In gas-liquid dispersions based on viscous non-Newtonian fluids, numerous very small bubbles are formed due to their high residence times in contacting devices such as bubble columns. The influence of these small bubbles on the measurement of the volumetric mass transfer coefficient in the contactor by the dynamic CO2 gas analysis method is discussed. It is found that their effect on this measuring technique is insignificant compared to that when using the conventional dissolved-oxygen technique.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260300303
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