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  • 1
    Electronic Resource
    Electronic Resource
    Three-segment electrodiffusion probes for measuring velocity fields close to a wall (1990)
    Springer
    Experiments in fluids 9 (1990), S. 43-48 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Three-segment electrodiffusion probes embedded in a wall allow to determine simultaneously the three kinematic parameters of flow close to the probe surface: the flow directionθ, the wall shear rateq, and the normal velocity coefficientA,v z = −A z 2. A well-controlled three-dimensional flow, generated by a rotating disk, was used to demonstrate the capabilities of this new kind of electrodiffusion probes by comparing experimental results with the prediction based on the well-known hydrodynamical theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00575334
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of ohmic losses on potentiostatic transient response of a reversible redox system (1991)
    Springer
    Journal of applied electrochemistry 21 (1991), S. 1091-1094 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The ohmic potential drop between the working and reference electrodes plays an important role in the early stage of the voltage-step transient process. The non-linear effect of the ohmic drop on the transient currents is calculated for large voltage steps, assuming reversible behaviour (negligible surface overpotential) of the redox couple O+ne=R.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01041453
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  • 3
    Electronic Resource
    Electronic Resource
    Fließeigenschaften der Suspensionen bei Schwingungen (1975)
    Springer
    Colloid & polymer science 253 (1975), S. 792-792 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02464479
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  • 4
    Electronic Resource
    Electronic Resource
    Poiseuillesche Strömung thixotroper Substanzen bei Schwingung (1976)
    Springer
    Colloid & polymer science 254 (1976), S. 927-927 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01775424
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  • 5
    Electronic Resource
    Electronic Resource
    V-t capillary rheometry (1969)
    Springer
    Rheologica acta 8 (1969), S. 17-22 
    Details
    ISSN: 1435-1528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Conclusion The method proposed is suitable for cases when we do not have available a rheometer enabling to obtain sufficiently accurate rheograms for lower values of rates of shear, so long as the parameters of the rheological model chosen are sufficient for expressing the rheogram. The method has been verified for the power law model by measurements for one liquid (one per cent aqueous solution of carboxymethylcellulose); the measurements were carried out withUbbelohdes modification of the rheometer proposed and also with the rotational rheometer “Rheotest”. The application of theV-t nomogram is illustrated in fig. 2. Results obtained by using theV-t nomogram and by computation from the relation [19] $$Q = \frac{{dV}}{{dt}}$$ [19] are in $$\mathfrak{F}, \mathfrak{B}$$ coordinates compared in fig. 3 with those obtained with the “Rheotest” instrument. Over the range of rates of shear from 20 to 60 sec−1 the agreement in the results was better than 2% relative; this is less than the dispersion of the results of each method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02321351
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  • 6
    Electronic Resource
    Electronic Resource
    Non-Newtonian flow in annuli (1970)
    Springer
    Rheologica acta 9 (1970), S. 278-282 
    Details
    ISSN: 1435-1528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Summary An analysis of mathematical model describing the steady-state, laminar, isothermal, axial flow in ducts of annular cross-section is presented which permits a solution to be formulated which holds for any model of incompressible purely-viscous fluid (generalized Newtonian fluid).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01973488
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  • 7
    Electronic Resource
    Electronic Resource
    Calibration of electrodiffusion friction probes using a voltage-step transient (1998)
    Springer
    Journal of applied electrochemistry 28 (1998), S. 329-335 
    Details
    ISSN: 1572-8838
    Keywords: friction probes ; electrodiffusion ; shear rates ; calibration ; transients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Voltage-step transient experiments are used to calibrate electrodiffusion (ED) friction probes. The approach is demonstrated on the probes in high-speed rotating impellers. This calibration has shown that shear rates as high as 106s-1 can be measured reliably using 0.5mm Pt working electrodes in ferro/ferricyanide aqueous solutions. The complete transient calibration experiment provides sufficient information about the dynamics of ED friction probes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003224018571
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  • 8
    Electronic Resource
    Electronic Resource
    Filmströmung nicht-newtonscher Flüssigkeiten an einer senkrechten oszillierenden Wand (1977)
    Springer
    Rheologica acta 16 (1977), S. 394-399 
    Details
    ISSN: 1435-1528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Summary The one dimensional shear flow of pseudoplastic power-law fluids in a laminar nonwavy film, flowing down along an oscillating vertical flat plate, has been studied both theoretically and experimentally. The corresponding mathematical model has been solved numerically for a set of values of the governing parameters and the results have been compared with the experiments. The agreement between the theoretical and experimental values is reasonably good; the results show a pronounced influence of vibrations on the film flow of concentrated suspensions.
    Notes: Zusammenfassung Es wurde die eindimensionale Schichtenströmung pseudoplastischer Potenzflüssigkeiten in einem laminaren wellenfreien Film untersucht, der senkrecht an einer in der Strömungsrichtung harmonisch oszillierenden ebenen Platte herabfließt. Das zugehörige mathematische Modell wurde für eine Reihe der den Vorgang bestimmenden Parameter gelöst und mit entsprechenden experimentell ermittelten Daten verglichen. Die gewonnenen Resultate zeigen einen markanten Einfluß der Vibrationen auf die Filmströmung konzentrierter Suspensionen, der mit dem aufgestellten mathematischen Modell gut erfaßt werden kann.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01534093
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  • 9
    Electronic Resource
    Electronic Resource
    Rotationsviskosimetrie mit kugelförmigen Spindeln (1977)
    Springer
    Rheologica acta 16 (1977), S. 248-260 
    Details
    ISSN: 1435-1528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Summary The rotational viscometric flow around a rotating sphere has been studied by variational methods. The exact numerical, as well as an approximate analytical solutions are given. Employing the analytical approximation, a simple method of evaluating viscometric data from immersional (portable) viscometers with a rotating sphere is proposed.
    Notes: Zusammenfassung Die Rheodynamik der stationären viskometrischen Drehströmung um eine rotierende Kugel wird mit Methoden der Variationsrechnung untersucht. Neben iterativen numerischen Lösungsmethoden, die zu exakten Resultaten führen, wird auch eine approximative „Ein-Gradienten-Lösung“ konstruiert, die durch Quadraturen dargestellt wird. Ausgehend von dieser analytischen Approximation werden einfache Methoden zur Auswertung von Experimentaldaten vorgeschlagen, die mit Hilfe von Eintauch-Rotationsviskosimetern mit kugelförmigen Meßspindeln gewonnen wurden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01523735
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  • 10
    Electronic Resource
    Electronic Resource
    Pseudoähnlichkeitslösung des Rayleighschen Problems für reinviskose nicht-newtonsche Flüssigkeiten (1978)
    Springer
    Rheologica acta 17 (1978), S. 463-470 
    Details
    ISSN: 1435-1528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Summary The exact similarity solution of the problem of the unsteady flow of a hypothetic power-law liquid near a suddenly started plate (Rayleigh's problem) is employed for the construction of an approximative solution of the same problem for arbitrary purely viscous non-Newtonian liquids. The testing of accuracy of this approximative “pseudosimilarity” solution is based on calculation of residua in the macroscopic balances of momentum and mechanical energy. Numerical results are reported for the Powell-Eyring model of the viscosity function.
    Notes: Zusammenfassung Die exakte Ähnlichkeitslösung des Problems der nichtstationären Strömung einer hypothetischen Potenzflüssigkeit in der Umgebung einer ruckartig beschleunigten Platte (Rayleighsches Problem) wird zur Konstruktion einer Näherungslösung des analogen rheodynamischen Problems für reinviskose nicht-newtonsche Flüssigkeiten benutzt. Die Überprüfung der Genauigkeit der genäherten Pseudoähnlichkeitslösung basiert auf Berechnungen der Residuen der integralen Bilanzen des Impulses und der mechanischen Energie. Numerische Ergebnisse dieses Problems werden für das Powell-Eyringsche Modell der Viskositätsfunktion angegeben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01534274
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