Počet záznamů: 1

Autocalibration of Electrodiffusion Friction Probes in Microdispersion Liquids

  1. 1.
    0338972 - UCHP-M 2011 RIV NL eng J - Článek v odborném periodiku
    Wein, Ondřej
    Autocalibration of Electrodiffusion Friction Probes in Microdispersion Liquids.
    International Journal of Heat and Mass Transfer. Roč. 53, 9-10 (2010), s. 1874-1881 ISSN 0017-9310
    Grant CEP: GA ČR GA104/08/0428; GA ČR GA104/09/0972
    Výzkumný záměr: CEZ:AV0Z40720504
    Klíčová slova: electrodiffusion friction probes * voltage-step transient * edge effects in microdispersion liquids
    Kód oboru RIV: CI - Průmyslová chemie a chemické inženýrství
    Impakt faktor: 1.898, rok: 2010

    Voltage-step transient problem, useful in electrodiffusion diagnostics of the near-to-wall flow kinematics, is solved for microdispersion liquids that manifest non-linear velocity profile close to the wall. The known solution of this problem for circular probes in a diffusion-layer approximation (DLA), assuming a power-law representation of the velocity profiles, Wein and Kovalevskaya: Collect. Czech. Chem. Commun. 49 (1984) 1297-1303, is corrected on the edge effects, important at low Peclet number, i.e. for the small probes and slow flows. A model of the transient process, controlled by convective diffusion at finite Peclet number, is developed here as a generalization of the approach by Wein et al.: Int. J. Heat Mass Transfer 49 (2006) 4596-4607. The model is applied for treating primary voltage-step transient data of several aqueous high-molecular polysaccharide solutions, displaying strongly non-linear velocity profiles close to the wall.
    Trvalý link: http://hdl.handle.net/11104/0182613