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  • 1
    Electronic Resource
    Electronic Resource
    A power-law fluid flow past a porous sphere (1981)
    Springer
    Rheologica acta 20 (1981), S. 128-132 
    Details
    ISSN: 1435-1528
    Keywords: Pseudoplasticity ; porous wall ; sphere ; drag ; sheardependent viscosity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Zusammenfassung Es wird ein Modell für die Strömung einer nichtnewtonschen Flüssigkeit längs einer porösen Kugel entwickelt. Die auf die in einer Ostwald-DeWaele-Flüssigkeit bewegte Kugel ausgeübte Reibungskraft wird durch eine Näherungslösung der Bewegungsgleichungen für schleichende Strömung gewonnen. Man findet, daß der Einfluß der Abweichung vom newtonschen Verhalten um so ausgeprägter wird, je größer die Porosität ist.
    Notes: Summary A model has been developed for the flow of a non-Newtonian fluid past a porous sphere. The drag force exerted on a porous sphere moving in a power-law fluid is obtained by an approximate solution of equations of motion in the creeping flow regime. It is predicted that the effect of the pseudoplastic anomaly on the drag force is more pronounced at large porosity parameters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01513055
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The influence of walls on the motion of a sphere in non-Newtonian liquids (1983)
    Springer
    Rheologica acta 22 (1983), S. 27-33 
    Details
    ISSN: 1435-1528
    Keywords: Wall effect ; pseudoplasticity ; sphere ; drag
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract The influence of the contained wall on the drag of a sphere moving through a non-Newtonian fluid is analysed in this work separately for the low Reynolds number and the high Reynolds number regions. In the former, we make use of the two-concentric-sphere model. It is predicted that the wall effect will decrease with the increase of the shear-thinning anomaly and this is in a reasonable agreement with the available experimental data and correlations. The wall effect in the high Reynolds number region is analysed in this work using the cell model (used to study the motion of an assemblage of solid spheres) and the predictions are in satisfactory agreement with the available empirical correlation for non-Newtonian fluids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01679826
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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