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Abstract
The motivation behind this article is to explain a role of the Navier number (Na -dimensionless slip-length) in prediction of closures for laminar to turbulent transition undergoing via eddies detachment from the slip layer in nano-cannals. Additionally the role of the Navier number Na in universal modeling of phenomenon of enhanced mass flow rate reported in micro- and nano-channels has been explained. The Na number should be treated as a ratio of internal viscous to external viscous momentum transport and therefore this notion cannot be extended onto whole friction resistance phenomena. Our proposal for unique expressing of a critical point in turbulence transition is that on a plane of fD - Re one needs two coordinates. The second critical coordinate has been discovered by Stanton and Pannell and is known to be the Stanton-Pannell number StPa. Finally dependence of the Stanton-Pannell number StPa on Navier number Na and Reynolds number Re is presented.
Authors (2)
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Paweł Ziółkowski dr inż.
- Środowiskowe Studium Doktoranckie przy WM,Instytut Maszyn Przepływowych PAN Zakład Konwersji Energii
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Janusz Badur
- Instytut Maszyn Przepływowych PAN Zakład Konwersji Energii
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach recenzowanych i innych wydawnictwach ciągłych
- Published in:
-
Journal of Physics : Conference Series
pages 1 - 8,
ISSN: 1742-6588 - Language:
- English
- Publication year:
- 2014
- Bibliographic description:
- Ziółkowski P., Badur J.: Navier number and transition to turbulence// journal of Physics : Conference Series. -., nr. 530 (2014), s.1-8
- Verified by:
- Gdańsk University of Technology
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