Počet záznamů: 1

On the effective temperature concept for liquid: Paradox of the similarity?

  1. 1.
    0361101 - UT-L 2012 RIV GB eng J - Článek v odborném periodiku
    Fedorchenko, Alexander I. - Maršík, František - Trávníček, Zdeněk
    On the effective temperature concept for liquid: Paradox of the similarity?.
    International Communications on Heat and Mass Transfer. Roč. 38, č. 7 (2011), s. 852-854 ISSN 0735-1933
    Grant CEP: GA MŠk(CZ) 1M06031; GA ČR(CZ) GCP101/11/J019
    Výzkumný záměr: CEZ:AV0Z20760514
    Klíčová slova: vortex shedding * effective temperature * similarity condition
    Kód oboru RIV: BK - Mechanika tekutin
    Impakt faktor: 1.892, rok: 2011
    http://www.sciencedirect.com/science/article/pii/S0735193311000959

    Vortex shedding behind a heated cylinder for diluted gasses can be solved by reducing to an isothermal case by the effective temperature Teff, with respect to the similarity condition ReC,∞=ReC,eff. Different situation occurs for liquids. Although the similarity should exist (cylinder cooling stabilizes wake), finding the value of c represents a serious experimental problem. A basic question remains: exists a similarity for liquids or not? This study revealed that the mentioned similarity does not exist for water. Moreover, more general statement sounds: if the kinematic viscosity of a fluid tends to fall as temperature increases the similarity does not exist.
    Trvalý link: http://hdl.handle.net/11104/0198508