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On the effective temperature concept for liquid: Paradox of the similarity?
- 1.0361101 - ÚT 2012 RIV GB eng J - Journal Article
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. E-ISSN 1879-0178
R&D Projects: GA MŠMT(CZ) 1M06031; GA ČR(CZ) GCP101/11/J019
Institutional research plan: CEZ:AV0Z20760514
Keywords : vortex shedding * effective temperature * similarity condition
Subject RIV: BK - Fluid Dynamics
Impact factor: 1.892, year: 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.
Permanent Link: http://hdl.handle.net/11104/0198508
Number of the records: 1