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Heat Transfer Research
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ISSN Druckformat: 1064-2285
ISSN Online: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v29.i1-3.80
pages 54-65

Heat Transfer Problems of Bypass Laminar-Turbulent Transition

E. P. Dyban
Institute of Technical Thermophysics, National Academy of Sciences of Ukraine Kiev, Ukraine
Eleonora Ya. Epik
Institute of Engineering Thermophysics of National Academy of Sciences of Ukraine (IET NASU), 2a Zhelyabov Str., 03057, Kyiv, Ukraine

ABSTRAKT

Some aspects of bypass laminar-turbulent transition are described. The distributions of local transport coefficients (friction and heat transfer coefficients) are analyzed at the 3.2−7% turbulence and the 1−11.2 relative longitudinal dissipa¬tion scales. Depending on the scales, a few types of the bypass transition (laminar-turbulent and pseudolaminar-quasiturbulent transitions and their combination) were detected. The tendency to the formation of the upper thermal bypass transition, which is characterized by monotonic changes in the heat transfer coefficients along the surface under flow, was verified.


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